It's a pain. The 'conversations' thing is not useful at all, if I want a particular mail from in there it's so hard to find, if a mail has split into multiple chains it becomes so bad I now start a new one. I also wish they would listen to requests for a 'block' function. Problem is I'm using it years so am more or less used to it and changing would probably be worse.
Google Play is bad too - I can only buy/rent their kids movies in the dubbed versions, Itunes lets me select the language (as it should I am damn well paying for it).