Update: received the new MAF today. Installed and let the car warm up.
Trans fail safe went away and idled smoothly. Until the check engine light came on with all the same wonderful codes that were present before:
203 lambda regulation limit bank 2
227 lambda controller deviation bank 1
202 lambda regulation limit bank 1
242 misfire 5
243 misfire 6
241 misfire 4

So, not the MAF causing the issue. Back to the drawing board: not a significant vacuum leak that I can find and not the MAF. My guess now has to be oxygen sensors? I haven't changed the upstream sensors yet, but I have changed one downstream. Also going to grab a can of carb cleaner and double down on the leak search. Smoke test was amateur and I possibly couldve missed it. Though I know it's not the usual culprits, it may be hiding.