I think the problem in general is that once you have to teleport or slide, it's no longer really worth walking around in your play space. You may make small adjustments here and there to reach stuff or back off from enemies, but for the most part you'll just teleport or slide around.
I'm afraid that's just the nature of the beast. I don't think it would change that much even if you had a 5x5m play area. Once you have a huge world to move through your play space will just prove to be inadequate.
That being said, roomscale works really well for games like SPT or Keep Talking And Nobody Explodes (use elevator mode).