Some people (including myself) would like to see the ability to use elytras in T gen fights while attacking. we think this would add a whole new layer of strategy to the game which could be very fun.
People with an elytra would be killed in like, 2 or 3 hits. I cant see how you could possibly make any viable strategy using them. Changing server elytra mechanics just to allow them in battlezones doesn't make much sense if there's no way to effectively use them anyway.
you discount skuhoo the usefulness of vertical space... not only could they be effective snipers if trained they could also be good bombers as well. as for them dying rather easily... yah that would be there... but conquests are as much about fun as they are territory
At least in the simple respect of turning off anti-elytra protection during a conquest battle (think of it as defenses are lowered during a fight); that's a simple enough thing to do. The concept of people using their Elytras for battles intrigues me very much, especially with the latest firework changes.