I see it as ArenaNet's last attempt to salvage PvE before GWEN. PvE is unappealing due to lack of motivation to play Hard Mode, by either unfair enemies or crappy loot. The update better give PvErs a reason to PvE...it's very pointless, ATM.
And the update was said to be "within two weeks" of May 27th, i.e. it will be next week. Of course, with ArenaNet ETAs, you never know. I expect to see a relevant Weekend Event as well (probably double Sunspear points again).
Anyways, here's a recent Gaile Blog summary from GWO which details some of the additions this update will provide. From that log, and my own observations of random Gaile postings, here's what's going to be in the super-update.
- Mesmer Fixes: Gaile posted a long Dev Update about how the Developers will fix the Mesmer in PvE by fixing the scope, i.e. the role, of the Mesmer. How they will fix the Mesmer in PvE, and not break them in PvP, I do not know. I bet that ArenaNet's fix for the Mesmer would be to make the Sunspear Skill alloted to Mesmers so super-duper powerful that every PvE party will be forced to have a Mesmer. Gaile also said that the fixes will bevery subtle and on a trial basis...which implies, in ArenaNet terminology, that they are super-broken.
- Soul Reaping: Gaile said that there will be updates (plural) to the Soul Reaping mechanic; atleast "two changes," apparently. How can there be two changes? You fix it, or you don't. If ArenaNet's solution is to simply remove SR Energy gain from Spirits, which players have been saying, I'll simply laugh.
- Sunspear PvE Only Skills: Oh, yeah, the supposed big PvE fixer-upper. These skills were supposedly to have been released during Hard Mode...so if ArenaNet needed 2 months to balance these skills, they are either ungodly overpowered, or just plain useless. I think it'll be the former; would anyone use them if they were useless? Of course, that'll lead to the more "cookie-cutter" mentality that you must use the skill, as is with Lightbringer's Gaze...ho hum. We'll see.
- Skill Balance: Since the May Championship is over, ArenaNet will do a skill balance. Rangers won't receive a Bow Attack Skill revamp, just a few general changes. Of course, you know that these Skill Balance changes will cause the PvE community to whine that their obscure farming builds has been nerfed. Just a general trend.
That's all I can seem to gather. ArenaNet occasionally surprises with extra features within updates. But it's clear that this is the last significant update before other online gaming opertunities will be...considered.