Yeah, it seems like the right thing to do, but it's what I've been doing all the time. g_weapondisable 4 + map_restart (or even a whole map reset) simply "prefers" the blaster, in a way. You spawn with the blaster in the hand, but the saber is still there, and most of the bots prefer sabers. It's just annoying that it's not an option in the Create server section, since it's so enginally (...right?) possible.