Because most clan wars are 8vs8,that's why I don't understand the whole clan thing in BF2,unless it's 64players it's not a real battle to me.
For clan matches counterstrike or unreal tournament(soon 2007) are the ideal games.
And to explain the whole thing furthermore:
Medic:small maps,mostly infantry combat,let's take the guy with infinite health,until I have to reload I'm dead anyway.
Engineer:Again,small maps,your enemies are either infantry(that's the shotty for) or some kind of tank(AT-mines).
AT-guy:Same as engineer,just exchange the weapons,DAO-12 for infantry,SRAW for tanks.
All the other kits are not that useful in comparison when there are only 8vs8.
I would only play clanmatches in a clan if they were 32vs32,but that's a lot of coordination to get everybody on teamspeak and on the server.