The lists are very different and the groups will NOT like a percentage merger for the same reason NW pilots dont like it. The exception is that this will effect both groups.
Colgan and Pinnacle both have their group of 'lifers' who have been with the company for a long time . . . the 9E lifers will get screwed a little since the top of Colgans list is around 10 years and the top of 9Es list is more senior.
The companies both had hiring sprees at different times. This means that the block of "spree hires" will be integrated into a large area of pilots in the other pilot group. Thus, there will be seniority gaps where a couple of months seniority at one company will correlate to a year or 2 in the other company.
They need a date of hire method with fences. Fences arent needed as much if they use the percentage method (which was never used before NW/DL).
ALSO, dont forget that a pilot cannot get bumped out of his/her current award. Just because there will be more pilots senior to you on a 'new list' doesnt mean that they can bump you.
This, of course, is all light years away . . . so no worries - just my thoughts on a merging of lists.
SR