So, I've decided to give the game another try despite my disdain for the changes to stealth. I'm still pretty unhappy with it, but the level design for the new heists seems to make stealthing more feasible. Unfortunately older maps don't support the new stealth setup well, so missions like Framing Frame are now such a pain in the ass to do that no one really plays it anymore. Since it's obvious Overkill has no qualms with drastically changing the game post-release, I'd like to see them revisit the level design for older maps that were intended to be stealthed and update them to make maneuvering around guards and cameras easier.
Went ahead and bought the latest DLCs since they were on sale. I've only tried Election Day once so far, but I love Shadow Raid. Not so much the guys who show up in the chopper (that was unnecessary) but overall an awesome mission.