There's no doubt that 1.5.1 will greatly improve Aion (less grind anyone?), but players seem to be sticking on a few major points that aren't yet in the tentative patch notes. Most of the players commenting on these notes seem to feel that Aion's first big patch should tackle the crashing fortresses issue (crysys.dll), flying spiritmaster pets, better UI customization, and a number of other issues (less grind included). There also appears to be resistance to a new debuff that will be added to aether extraction. Players will now be randomly debuffed when gathering, but can quickly remove it by typing a captcha. This change is obviously aimed at bots, but many state this will become an annoyance for everyone.
Check out our summary of part one of the patch notes and AionSource's interview with NCsoft's Lani Blazier to get a comprehensive view of the situation.