Please consider that a client bought your software that he cannot use and spent several hours doing free betatesting, reporting these issues. It leaves a bit of a bad taste if it’s a standard reply that user is an idiot and my software is perfect. I would instead seek ways to improve and avoid these issues.
Regarding issue #1. This is how nicely Houdini deals with it and I only had to change 2 parameters to achieve that:
Regarding issue #2. Repacking(with different seed) is most common operation you’d expect from UV packing app. Scaling with distortions after repacking is an error, if even for reason I accidentally pressed it. Nearly always in production artist must adjust, change UV after. Only for lightmaps or mask (UV2) you’d expect 1 click solution.
For example in this case I might be interested in orienting Planks the same way for Wood texture to flow correctly. In Blender i always press CTRL+P(repack) for about 10 times for different packing, until it’s least work for me to move and rotate a few bits. Similarly with IpackThat you can stop at any time you see ideal solution on screen. Houdini example is above.
I hope this helps improve this already superb software. Would be great to use it and not have to export.