I have been thinking this as well. 5e simplified the rule system in a manner that made the game more accessible to new players and less convoluted in general for veterans (even though some people still like the advanced system). There really is nothing wrong with homebrewing in some rules or even using some of the older 3.5 rules for a few mechanics you want to add back in (armor reduction comes to mind).
The weapon short rest abilities are a nice touch. These are the kind of homebrew things I want to see stay, I do not want a direct 5e port. Some of the crafted items too, like grease bottles and such. I have asked myself this question as well "Am I wanting this game to be too much like 5e despite the many other things from earlier versions"? I think it is safe to say that we wont be seeing classes from 3.5, but there is no reason that the homebrew philosophy cant work. In fact I think a lot of homebrewing will be necessary, which is why I havent really argued against the help action replacing "Spare the Dying" cantrip. there is a lot that i am not a fan of but I do think thinks like the Firebolt cantrip may grow on me if they add more of the cantrips to the game.
