Every single online tourney I have seen has this kind of rules. It is completely normal. Also you seem to be demanding more than suggesting, implying your team won't participate if rules don't go as you want them to be, missing out the fact that this is for the community and not for honor and glory.
As I said, I am willing to step out so we can get this going. That means my team won't be able to freely swap since no other range dps.
Any more complains now?