This game was surprisingly really fun lol... And honestly I think playing it on the hardest level would have been almost impossible or at least it woulda took a lot longer to finish.
Only thing I don't like is that the Ghostbusters don't revive eachother when you really need them to. On the last level before you f!ght the final dude it seemed like one would go down I'd revive that dude and then two more would be down.
Dog it was hard as s**t on hard because just like you said dudes would never revive you when you needed them to. It took me about 7 hours to beat the game but that s**t was frustrating as hell on some parts. On the part right before the Final boss I had to spend 80% of my time reviving n*ggas because they wouldn't do it.
The only thing I regret is that I didn't get some of the achievements that I could have easily have gotten if I looked at them before hand. I'm the type of player that gets things as I go a long and then I look at the end of the game to see what I missed. I missed some that I should have gotten by just doing a little more. It was still a fun a.ss game though