Jay, I completely understand your concern, but IMO implementing a rule like this impacts the game's strategy far less than spotting balls on the footline if "X" number of balls fall in the kitchen, or worse, above the side pockets!
Certainly for gambling purposes the extra balls represent opportunities to move, but lets face it, when you spot someone 10 - 8 and the breaks, how is that one pocket?
I believe that one of the things that draws folks to tournaments is the ability to play some rounds even if they don't really have a chance to take home the prize money.
Shortening the game can afford some time to extend the sessions which will at least give folks time at the table. It still would allow players to move balls to the other end without "in effect" canceling the game by putting them back on the foot spot.
Nothing you do to change a game would render it the same game.
Even a time clock would affect the game far more than it would 9 ball or even 14.1 since 1 Pocket is so much a thinking game. Just like speed chess isn't chess, setting a time clock to 1 Pocket only extends the better players edge and changes the game.
I suppose there's a lot of ways to look at it. Just an idea.