I'm sure it's entirely dependent on scheduling and location, Sentai got him for half of Persona 4 the Animation after all.
I've gotten over it, honestly. Matthew Mercer deserves just as much respect, just like when he took over the role of Leon Kennedy, those were huge shoes to fill and he made them fit like a glove (WOW THIS IS IS AN AWKWARD CLASHING OF TWO METAPHORS.)
It does suck when a classic VA gets replaced for no obvious reason, I get it, it makes people feel that the developers just don't have the same appreciation that the fanbase does, like with David Hayter being replaced in MGSV (I'm only fine with this because it's Big Boss, getting ever closer to MGS1.) But then you have stuff like Resident Evil Revelations 2 where the new actress for Claire is totally fantastic, no better or worse than Alyson Court. I'm also positive that ALL of these actors don't want to be replaced...But I guess in Baker's situation (and maybe Paul Mercier's as well, we didn't hear much about why Mercer replaced him,) he's got certain priorities, possibly financial ones which you can't begrudge him because voice-acting is known not to be well-paying unless you're a celeb outside of the job.
Dr Pepper. It's an intellectual drink, for the chosen ones.