Ah. Sounds like you've had some real champs there.
Cloth. "no one uses Simonis"? Ummm, sure. If you want high-speed play, asymmetrical up/down table play, whatever, it's your table and you cover the thing with what you like --
home advantage.
Leveling. There's no excuse except laziness if the installer left you with an uneven playing surface.
I'm gonna guess you have a 3-piece slate table. You could do this yourself if you really took your time, but it's effort: You need a good long level, and you have 3 pieces of slate sitting on a frame, shims you can add around in various places, screws to tighten down the slate pieces that change the alignments (back to square one!), leg levelers, and then the seam sealing with plaster/beeswax. I think it's worth having a mechanic do it for you. You mentioned Tom Ross, so maybe getting a mechanic reference from
http://tomrosspool.com/ makes sense.
I cut my teeth in this game back in N.J, from an age when I was only allowed to watch. Never visited the Shakespeare in Denver, but knew about it. I'm sad when an old place closes. I used to work in a place with rows of 9-foot Brunswicks and 10-foot snooker and 3-rail tables. Over time, the clientele became younger, and, well, ultimately, the main room was shrunk to make space for the video-game area that always had more people in it.