... wow. Not only is Senko still not getting it, and complaining that nobody's giving him reasons (which we have) or explanations (which we have) or concepts which explain the 'conversion' of 4th to 5th (which we have), but he's managed to pull more of his kindred out of the woodwork??
The disconnect is that you're reading 4th Edition as though it were the start of Shadowrun; it wasn't, and it ain't. The issue is that all the things you're talking and complaining about - whether that's bought-off-the-shelf commlinks and programs from 4th that can no longer do what a top-notch decker from 1st-3rd could do (used to be the only ones who could, and once again are), or the fact that in 4e, trolls are mysteriously slow (when in fact before 4e they were never fast) is easily explained out of game as being the developers and writers going 'okay, yeah, sorry, we screwed up, let's get the game back on track' and explained in-game by the fluff you've already been given.
If you're going to run a game, and if you insist on not taking the rules as the rules and the fluff as the fluff, then Senko, you are gonna have to either work it out yourself despite your terrible, terrible work load, or else you're going to have to actually listen to the people who are giving you several Very Reasonable Explanations and not working so goddamn hard at spouting crocodile tears and fighting them. Or you can do all the work to go back and get an understanding of the editions that existed before 4th, the Shadowrun world as it existed before 4th edition, and come to grips with the world as it's been described before your own personal 1e.