Bombstooling is pretty good, but you have to either really read DI or space it perfectly.
I screwed around with it for a week, it's good. It can be a free kill (yeah, dair!) but you have to read DI unless you try to FF and start a jab lock.
I would say a bombstool is just as useful as a BAL/BACL. Also, it's about just as practical.
BAL-
Opponent must not tech --- Minus
Must be spaced well --Neutral
No reading involved --Plus
Can setup Jab Lock -- Plus
Can lead to multiple moves (Up-B, Up smash, dair, fair, nair, another BAL) -- Plus
Bombstool-
Opponent cannot tech --- Plus
Must be spaced well -- Neutral
Must read DI -- Minus
Can setup Jab Lock -- Plus
Can lead to multiple moves if getup is read, or hit during the footstool (dair) -- Plus