Hi Josh,
The good news is I can assure everyone there won't be the release date delays experienced with Moodle 2.0 itself. However, our original target release date of March has slipped for a number of reasons.
This is at the same time a massive release, and yet we're not introducing new Totara features! This is because the underlying architectures of Moodle 1.x series and Moodle 2x series are very different. We won't see a repeat of this type of upgrade so we'll have greater certainty in release scheduling going forward.
However, for the Totara 2.2 release it's inherently difficult. There are approximately 181,000 lines of additional code in Totara compared to a standard Moodle and all have to be ported. If the team did that manually it’d take forever so some automated scripts have been written but it's still a massive job and thankfully will not have to be repeated.
Of course, for you, our subscribers, it's paramount the job is robust so we don't wish to cut corners to meet arbitrary deadlines. Our production releases need to be well tested and as described, this is a massive shift to the underlying code which won't be repeated for many years. Due care is required. Progress is good and I will keep subscribers updated via this forum.
kind regards
Richard Wyles