I'd like to see lights and lighting. Interior lights/shadows, spotlights, IR spotlights, headlights, etc. And the M1A2sepV3, T-14 Armata, zombies, & Area 51 w/UFOs.
Real world, or even for flight sims, I'm on board. For a PC-centric tank sim, IMO, a stick is artificial "cool" that adds the interface to the enemies you're fighting.
I recommend the mouse and keyboard; far more precise, and allows seamless access to menus, the map etc. Fight the enemy, not the interface. Oh, and I want the Roswell UFO crewable in the next update.
Does an "eye-candy" solution degrade the sim? Having lighting which units don't respond tactically to seems no more broken than denying those units the use of their lights to begin with. In my opinion, go for it.
The idea is to avoid showcasing SB with obsolete building sets, odd proxy vehicles, and other omissions due to scenarios being a generation or more old. Whatever features are added to 3.X, they ought to be accessible via official, provided content. I know there's a "do it yourself" chorus here, but expecting new people to learn the editor or sift through community-made content isn't reasonable. SB's scenarios should stand on their own.