If you don't like the GMail app (and I don't particularly like it either) just use a different one. There are a lot to choose from, and there's no need at all to use Google's app for GMail, or for anything. I keep it disabled on my phone.
I'm currently using Nine, which allows me to turn Conversation view on or off, shows me the recipient name in the Sent folder. I've previously used MailDroid, AquaMail and K9, all pretty configurable even if I can't remember exactly which options each has. Just try a few and see what you like (remembering that the views are only one element of an email app: I personally won't use one where the app company passes my mail through their servers, no matter what benefit they claim I derive from that).
As for hoping Google will listen to you, good luck with that - their attitude (not uncommon amongst tech companies) is "we know best", and you are supposed to fit into their mindset.