Didn't Aztech get rid of the blood mages a while back? Maybe after they tried to take over the company (also, the world)?
They're cheap and easy bad guys, which makes them boring. Their major strength to the game is the culture, but I'm not sure how much you can focus on the pyramids and blood sports without them getting overplayed. I'd vote for them getting their nose bloodied and shedding some of the negatives to see if it makes them multidimensional.
To be fair, before Wakshaani's description, I still thought of Renraku as the corp that had an AI get out of hand many years ago. It might take some doing to change player perceptions. The history of the game is a big strength, but it can stagnate the game as well.
Luckily for Renraku, Crash 2.0 wasn't long after thier "little incident", and now, 15 years later, most people just sorta assume that it was all tied together.
Because people hate the past.

Renraku's current ad campaign focuses on teh human side of things (And, yeah, human. And pretty humans at that. No uggos on teh corporate payroll! Hie thee to a Renraku-backed clinic for some bio-upgrades, young man!) with the service industry. Anytime you contact a Renraku branch, you get a real live person on the comm, you meet real people in the store, and, in general, it's fleshy city everywhere you turn. Computers and droids are serving people and are completely- harmless.
They make sure of it.
Renraku pampers the HECK out of people and uses their massive database to make sure that everything you like is available for purchase every time you turn around. WIth predictive analysis, they even provide you things before you even know you need them.
Renraku: How may we serve you?