All boss drops should be available both sides. Different names and look sure, different boss, why not. But end game loot like extendible weapons (aion gold) should be available from boss both sides. As it stand Glads and Chanters as an example need to do Asmo side instance for the pole/staff.
The Legendary Elyos rad boss, though level (aion kinah) 48 gold it is almost exclusively Elyos. All loot in game at that level should be attainable from both lands! Can Glads get a Pole like the Commander Bakarama one Elyos side?
Bakarma spear was crap before 1.9 (and still is on live). zapiel is best in the game right now and triroan is almost as good as bakarma next patch. So elyos currently have the best option and do have options of their own in general for next patch, although it is not really hard for elyos to get to draupnir.
Nobody even brought up Bolvig, who physically can't be attacked by Asmos even if we wanted to. His extendables are great for sins since they have no attack speed, so no competition with anyone but sins for getting a second extendable if you were to get another. As if the drop rate for weapons on Bollvig, Zapiel or Jeshuchi was any better than Alukina.
Asmos got easily rushable Adma Stronghold where Elyos must spend 2-3h each run. Asmos get an easy access to Draupnir that can be rushed to the end boss in what? 15 minutes? And he drops some of the best weapons too, better than Zapiel in fact for 1.9 versions since you can merge-add attack speed on them and they are level