Glad to contribute... Especially because there seem to be some nice and civilised people in these forums. I used to visit a CS gun modelling forum, and the first reply I ever got was a stupid flame - for requesting a custom gun model in a custom gun model request forum ???
Anyway, back to the topic:
Stupid me - you're right. I totally forgot about linux users! So why not take tar.gz? If it's supported by all recent programs for all important OS'es...
With regard to the waypoints, it may indeed be the best idea to offer a "basic edition" as standard, and optionally some more elaborate waypoints. The problem with PB, for example, is that the more possibilities bots get, the higher is the risk that they fall down somewhere because when engaged in combat they don't stick strictly to the waypoints... And that's the point where ppl should be able to choose which way they like it: Do I want a "straight" waypoint set, or do I prefer having bots run over telephone cables, although they may occasionally fall down and die?
Hm, that download assistant sounds nice, but I wonder if the trouble programming it is worth the benefit?
Another point we haven't addressed yet is the fact that some maps are ideal to play with bots, while other maps are great with all human players, but virtually unplayable with bots. Can RB bots use lifts, for example? Or can they open those doors that need to be pushed ("use" key) instead of just walked into? PB bots can't... That's why it might be a good idea to introduce a map rating by "bottability"
After all, this is a page focused on bots...