Harmy said:

So, guys, I was thinking, what would you think if I released v2.1 as AVCHD and MKV now... ...I really want the BD to be worthwhile content wise, and I just don't have the time to do that to my complete satisfaction just now

That sounds like a practical plan, Harmy. Remuxing the MKV with tsmuxer is as easy as pie, and my suspicion is that the average person would forgo the menu and lossless audio to have 2.1 without a longer, indeterminate delay. I suggest you release the MKV.

EDIT: This might also take the pressure of releasing 2.1 (which I'd imagine you are feeling to some extent) off a bit.