The big problem I see with t10 is by the time you finish the armor quests and have the power you have nothing to do with it.... there is limited reward in rerunning this zone..no GSOA....limited XP shards......cash loot is mostly meh at best....so why would you want to run past the armor quest? for essence?
I have received one (only one) GSoA out of t10...with it's difficulty it should be better drop rate for sure....cash loot could be a LOT better....currently I think farming esse's in the t10 expedition is better because I hate t10 so much....as well as farming the plagueborns....t10 could be more fun if the spawns were fixed and with the length of time it takes to get (the orc boss for example) it should drop at least one esse every time...the esse drops in t10 are the suck! Now some mobs like Venombite who seems to spawn with the death of a certain mob that seems to be up at every respawn shouldn't because if that were the case you could get 1 t10 esse every 15 minutes...I think that the plagueborne quest should be in line with the orc weapon/bandit loot/vampire quest (100 items turn ins and 100 kills) but that's just me...will still take you a good while to complete it (about the same time it would take to complete the armor)....of course I also wish you could adapt the armor by doing more than one faction....get the orc armor and combine it with gnoll/sarnak for the benefits of each respective armor type (but I have mentioned that several times)
as far as "for esse?" yeah because you gotta do the UW 12 at some point....but spawns are so borked at the moment that is a REAL headache!