Why would you ever want to play the bloated, poorly balanced mess that is 3.5? Play 5e for beer and pretzels night, and 2e for when you want to get in-depth about your dungeon crawling. Or maybe play a system that isn't goddamned D&D. I've been playing Savage Worlds Adventure Edition recently, and I find it runs as a good pulp action system while still being easy to learn and run.
That's an aside, though. The question at hand is how much of a beer and pretzels game does the current player base want Shadowrun to be? I personally find that 5e is plenty beer and pretzels when you run it Pink Mohawk.