They're also "coded" as Hispanics and white trash, and that's just in UCAS and CAS. The "coding" changes with local stereotypes and prejudices, so really, they're only "coded" as "prone to poverty and violent crime".
The term "Orksploitation" is a plot relevant in universe concept. A Jackpointer mentions the "X while black" meme but replaces black with ork. They are frequently banned from sporting events and experience literal Jim Crow era segregation. It is very much a racial coding, and while I could see some Hispanic coding as well. And yes, they are not used the same internationally in the setting, but it is disingenuous to pretend that they are, for the most part, used as a stand in for racial groups that are treated by mainstream society as violent, scary, and less intelligent outsiders. They definitely are not a metaphor for the lower class, their coding is extremely race based. Again, we have an in universe KKK preforming lynches, this isn't
really a discussion I am interested in having. If you are trying to say goblins are not a very race based allegory, fine, but I super don't want to talk to you about that if that is the case.
Having a player 'race' choice in a game who bling out cars, wear grills, are relegated to jobs as laborers, combat, or criminals, have a massive incarceration rate which results in lots of single mothers, and who are assaulted and murdered by, lets face it, the KKK, with a penalty to how smart and well spoken they can be is pretty mortifying for a game line in 2019. I am very not surprised they are not retaining this element of nostalgia from older games, especially because I don't think many players have a big emotional attachment to it (at least when it comes to orks, I have literally never seen an Ork PC who was not logic 3 or 4 and I suspect the lower logic leaves a bad taste in people's mouths, which is why people avoid it and why none of the Jackpointer NPCs exhibit it. I have seen the 'cute dumb troll' archtype a few times).
Orks and trolls have always had lower mental stats throughout the five editions. It’s a balancing mechanism to their higher physical stats and possibly even Urge and the environment they grow up and live in.
There’s a long thread about that elsewhere on the forum.
It doesn't matter if it was true across previous editions, that is a classic example of Status Quo Stonewalling, you don't make a new edition with the goal of keeping things the same because that is how they were, you do it to fix problems and make good changes. And and saying "You know what? This is a bad idea with some seriously terrible implications that hurts the intended message and justifies an in universe viewpoint that is intended to be incorrect, and it should be different" is a good change.
Yes, it was a balancing mechanic in previous editions, but balance is not an in universe concept. It is made by OOC designs and it is trivial to rework orks and trolls to not require their mental stats to be lower. And, more importantly, it actually fails as a balancing change, because orks and trolls are good (and in 4e orks were broken) at anything not requiring the character to have good logic. It doesn't balance the highpoint because no character who cares about the downside will be affected by it, only people who don't. You can't really balance via opportunity cost, and in fact they didn't in 5e, they balanced by costing, which had its own problems but was entirely unrelated to the logic penalty.
If it is intended to represent the traditional ork or troll upbringing, 1: It doesn't model what logic actually is in universe, we have qualities such as uneducated and low skill characters to represent people who didn't get a good education, and 2: It shouldn't be a mandatory penalty then, because the idea that all orks are slum dwellers who don't go to school and never read a book is incorrect, and PCs are intentionally curve wreckers. It doesn't actually make anymore sense as a mandatory limit than saying all elves need to assign resources to C because 'elves are traditionally rich' or giving humans a max logic increase because humans tend to get into good schools.
I am not saying you have to like the change, but I am saying it isn't a case of 6e trying to 'simplify the game.' It is fixing a pretty major and likely somewhat embarrassing thematic problem that inadvertently has Cata arguing in favor of unjust social structures and prejudice because it is saying that, objectively, orks and trolls (who are, again, coded as racial minorities extremely heavily) deserve discrimination because they aren't good at things that require thinking, so they shouldn't even try, and should just let the humans and elves do the thinking for them. That is a horrific disconnect from SR's intended statement about race that lines up with what real life biggots who call themselves 'race realists' say about race. The argument that a media depiction is really old isn't a good argument either, a big reason a lot of changes in depiction of race are being demanded now wasn't because people's preferences or feelings changed, but because people didn't have platforms to point out problems. Orks having intellegence penalties was a problem in 1989 when shadowrun was written, and is a problem now, but now there is an awareness of how people view this and are affected by this, which is prompting, again, a GOOD change by Cata.
There are plenty of things to say 'this is a weird pointless change that seems to be done to oversimplify things or because its being changed for change's sake' but this definitely has a lot of really compelling reasons to change.