Anything that makes artillery MORE useful is bad for BTech, IMHO. I've played in games with 10, 15+ Arrow IV launchers on the field (BN+ games, I was fielding over a regiment of just infantry, for example) and it's just BRUTAL. companies wiped out, lances failing multiple PSRs- when you gots a dozen LTs/A4s, you can fill the probably movements of mechs/vees pretty easy and simply luck o the irish will make SOMETHIN' hit. against slow vees and infnatry- brother man, don't even bring them.
bottom line- in ones and twos, yah, maybe they seem lousy. sink some BV into them, and it swings a game, and makes it unplayable, which is no fun for anyone. :-\
just my thoughts, o' course.