I'll tell you what bothers me so much about this rush to push it out the door.
1) Bugs. Look, let's face it... Mythic has a lousy track record for fixing bugs after something has been released. A great many of us who tested Stygian Abyss should recall the plethora of bugs that we noted during testing that went live, some of which took months to fix, some of which have never been fixed.
2) Timeframe. It's downloadable content. Yes, you have to put a release date on it and call it done at some point, but it's a DLC release. There's no box. No shelf. Nothing. This rush can only mean one thing: Electronic Arts expects them to show some sort of revenue increase for this current period, and the only way they can do so is by pushing Adventures on the High Seas out now. Which is not a good sign.
3) Potential for future booster packs. Let's face it, this doesn't bode well for future booster packs. At the town hall, Cal stated the intent was to work on boosters at a twice-yearly interval in a manner that would allow them to provide regular saleable content in addition to fixes and free in-game content. Boosters were going to be developed in a fashion that didn't detract from regular gameplay, and would allow them to work on them side by side with these other things. Instead, what's happening is that they're rushing UO:AHS out the front door as quickly as possible (I mean, come on... pre-alpha to release in one and a half months? Seriously?), at the exclusion of all other development. They're so concentrated on this that the anniversary has of UO has come and gone without notice, 13th year vet rewards may be published with the expansion, Magincia is still in tatters, and the Bane Chosen event is beyond pointless at this point.
I'm giving them an A for concept but an F for execution, and if the expansion is released in the form it's in presently on the 12th of October, I too will vote with my wallet. I refuse to allow bank space be a substitute for quality development.