I am confused. There is only one Z in the game, so the only way to get ZZZ would be to use both blanks, which would get you a lousy 10 base points. Given a blank should normally give you an out, you would be 100-150 points worse off if you played ZZZ instead of a word already in the dictionary.
So I hardly see what the issue is. Okay, so Q is a little bit easier to dump - but you could dump it pretty easily with qat anyway.
I believe it was the idea that: "Americans don't like tie games" combined with 4-on-4 hockey and shoot-outs will create many more short exciting scenarios that can be shown as news clips on sports shows.
Although the scores for the letters might need to be re-calibrated; especially for a word game, Scrabble holds up extremely well at high levels of skill.
The point values were based on the commonality of the letters in common use, the idea being that it's harder to come up with appropriate words with letters like Z, X, Q in them. The letters' commonalities may be different for the word set of serious play-- the Scrabble dictionary-- in which case the scores become strategic features only loosely connected to historic frequencies.
I'm surprised that J is so uncommon, though. I guess it seems much more common than X and Z because there are a lot of words beginning in it, and it's also at the front of a very large number of common first names.
So I hardly see what the issue is. Okay, so Q is a little bit easier to dump - but you could dump it pretty easily with qat anyway.