2 leaderships? Are you kidding? They (CG/EA) are not going to test out all the ridiculous number of combinations you could make and potential exploits.
They already said they want GA to be free of bonuses and be the real test of skill.
TW has turned into a silly playground of ridiculousness instead of an actual test of guild skills.
That being said, they don't seem to care about TW bonuses that makes teams nearly unkillable so I won't rule out them doing this to TW on a whim.