Well, that indeed comes as a surprise. I actually don't spend time on the forums, and therefore I really did not see this coming. However, I felt I had to say something as regards to the spoiled ending of such a great comic.
You have every right to wish to end it to focus on something else, whatever that "else" may be. And even if you felt compelled to cut the comic short due to a lack of inspiration or any other reason, no one could blame you for that in any way. You are the boss: your comic, your rules. While I will really miss the comic, I certainly can't argue over your decision.
Your justifications, on the other hand, feel really awkward to me.
Chapters 1 and 2 were both written to be able to stand on their own two feet, though, so this is as good a place to wrap things up as any!
Your opinion on this is to say the least quite staggering. No, the second chapter does not wrap things up in the least. Wrapping things up means leaving little shortcomings, and leaving significant hints or leads that might explain what little remains. You're not leaving a few unlit alleways, but a huge boulevard of unanswered questions.
Lisa's situation is the only one for which you could honestly say to have wrapped every issue up. We don't know what the future holds for her, but the last strip did sum up all of her issues and the way she felt about them.
Sara's altogether another problem. What is she feeling at the moment, in both romantic and "carreer" aspects ? What does she actually expect from the future ? What's the actual deal with Temperance (The last panel was really intriguing btw) ?
I could go on and list several other issues that would have deserved proper explanations. You did that when you brought P&A to an end. It's sad you don't here.
Once again, I'm not posting this to uselessly troll and whine about the comic's ending. Sad as I may be about the end of the comic, it's definitely your choice. However, I'm a little upset about the excuses brought around to justify the end. I would rather have had, if not a proper ending, at least something like "I don't feel like doing this anymore", period. You leave the comic unachieved. And that leaves me (and others I believe) really frustrated.
At any rate, good luck for your future projects !
EDIT : After having read the ad-hoc post explaining why you wish to end the comic, I understand a little better your position. In retrospect, I found you are really hard on yourself. I do follow DoA and GwS, and I'd say QUILTBAG really holds its grounds. But whatever the reasons, that does not remove the feeling that you really hastily ruined the end of QUILTBAG.
Take two steps north into the unsettled future, south into the unquiet past, east into the present day, or west into the great unknown.