Congrats for the Steam release ! I've bought the early access and started to test it.
I've got some incohesive results, and I would like to ask you some question.
I've exported a mesh with unaveraged UV islands (specific texel ratio for some UVs islands regarding their significance) , and it seems that "IPack That" does not take care of the texel ratio I've choose and the result is not even close to what it should be if the islands were averaged.
Then I've done a second test with all the UV islands averaged and then it worked well.
Did you plan to implement some texel ratio control, or at least keep the pre established one?