It sounds like you have a personal vendetta against these guys. This script is clearly beta so it most definitely will not be perfect. Although bugs do commonly occur the script is mostly functional and is worth the price offered. Sub does the same thing with having quests separate to the builder which is understandable considering the time/effort put into the questing script.
In terms of script review being removed, I do agree with OP that reviews should be left permanent with the option to edit from OP. I do like reviewing reviews of scripts to see the success of peoples progress reports/ failures before spending my hard earned cash on it.