That's what the previous owner did and I was thinking of doing the same. The original owner must have done something wrong because the poly eventually buckled and split on one end. Any idea what would have caused that? I'll try to post pics of it so you can see what I mean.
I feel the same way, which is why I'm having a hard time making up my mind. I just can't imagine only having a foot on each side though. I can put it caddy corner but it will cut off a good bit of my basement because it's so long. Apparently, there are lines drawn on the board showing were to cut it in case it ever needs to be shortened. I wish I could expand my basement a couple feet. 
Like anything that cures, heat is the biggest kiler, but it probably more than likely is one of two options, either it was applied thick in one coat (if the cracking is everywhere and smaller) or left in hot or wet areas (if the cracking is deep and fresh). Going to a commercial polymer producer with some pics of the board and an accurate description of what you need to do will get you amazing results, they will be able to tell you the BEST poly to place on the wood, how to long to cure it between coats (if any with the "correct" poly)
We're not talking the residential one step buy it in a gallon poly here, we're talking about a 2 stage polymer with an acclerant, similar to a fiberglass compound as to how its mixed. (1 gallon to .5oz)
The pros know, try looking in the good book of knowledge (phone book) for "industrial flooring" "polymer flooring" or "non-skid floor coatings" (all this is is the same thing as the other two with sand added after its batched). Oh and as a side benifit, it also can be colored, so if ya happen to want a colored tinge to the wood or a solid color top it can be done too.
I'm still against cutting the table, one end out slightly askew would be more than enough to make it comfy playable, perhaps a re-orginization of the game room is in order... perhaps a game cab on one side of the board twords the wall, so the shuffleboard sits out at a slight angle and fill it in with a bookshelf stereo or game memorabilia? Better yet.... showcase it, don't stuff it! make it the center of the room and work everything else around it... heck depending on W.A.F. or if you PLAN on getting divorced, maybe the living room or dining room has more space?
I'm not in your position, so I can't really tell how cramped you are, but I can say that I would have no straight wall in my house to put a 23' table, without blocking a door, a few windows, and a fireplace, or a door a few windows and loose the dining room table, but if I was lucky enough to score that table (or my bowling board) I can tell you I'd be blocking a door and eating on the couch. (more than likely sleeping in the yard too)
But hey! who needs floor to ceiling 5' wide windows on every wall and 4 sets of french doors to the outside world? And sleeping on a cot in the yard is kinda like camping!