I think some extremely crazy combo's need to be made to be even remotely as interesting/entertaing as the
Tetris Attack publication.
It would still be a lot slower game. I personally am not quite sure if it suitable enough for TASing... the game seems very slow and not very capable of showing anything out of the ordinary that isn't possible for humans.
And no offense at all, I know very well that people making TASes spend effort on them, and it's frustrating if it isn't appreciated... but I don't think 168 rerecords is enough effort to make any TAS interesting. So besides from that I don't think the game is particularly interesting if someone would use spend a lot of time and rerecords on it, spending only 168 on it (which, lets be honest, takes about 3 minutes) surely didn't help.
I would much rather see an improvement to the published Tetris Attack movie I linked above, which is very possible, as there is already an improvement out there on youtube.