Pool has a myriad of problems, the qualifying structures being just one of them. I agree that to have a 'closed' tour similar to the PGA would be a good thing, and that in having that there should be a Q-school where the bottom-ranked pros must compete against the top amateurs. IMO though, the right way to do this is simply with an elimination tournament where the top x finishers get on the tour, not with some kind of hokey nine ball ghost challenge or anything like that. This is something the women's tour needs to gravitate towards desperately, IMO, because that tour is very much closed. The UPA events, however, remain for the most part open - show up and pay your entry and you can play. Pay a little more and you can have touring pro status. Also, most open tournaments in the US are just that - the US Open and Louisville, for example, place no restriction on the number of players who can compete, and they have no problem completing the events (or not too many problems) in 4 or 5 days. Not too much of a qualifying problem.
The Cardiff WC and the BCA 'Open' are exceptions. Both are, by my definition, invititational tournaments, and the BCA tourney in particular is brutal in that their manner of selection for the 'exempt' players seems totally arbitrary. If you are holding a 'closed' or invitational tournament, you need to draft out on paper the EXACT CRITERIA by which you select players to play, PUBLISH it for all to see, and then STICK TO IT. This is what they do for big golf and tennis tournaments, and it's fair. I fail to see, for example, how Aaron Aragon and Art Wiggins managed to be exempt into the BCA tournament two years ago, but a player such as, say, (hey pick a thousand names, I'll pick Kid Delicious), was not. That's absurd. The Mosconi Cup also could use an overhaul in this area. For golf's Ryder Cup, the selection criteria is there for all to see but I challenge anyone to tell me what it is for the Mosconi Cup.
It goes to integrity. Both the BCA tourney and Barry Hearn's World Championships and Mosconi Cup are good events, and they're probably doing the game a lot of good at present, but a COMPLETE OVERHAUL is needed, and needed soon, to make the proper use of the benefits they have provided. To compare the job that these guys do with that done by the USGA, USTA, WTA, R&A, or PGA in their respective sports is laughable. Someone needs to take things over and say 'to hell with the players, and to hell with the promoters, the only thing that's important is the LONG-TERM future of the game and it's credibility.' The game needs integrity and credibility, and it needs it bad. And, I'm sorry to say, it's not going to get it from Barry Hearn, Luke Riches or Matchroom Sport, and it's not going to get it from the UPA, or the WPA, or Barry Berhman and it's certainly not going to get it from the BCA.