I've watched a couple of Per's livestreams breaking down some solo sections. Such a musical ear, brilliant. I haven't checked the Xenotaph one though, will have to.
In terms of the vocals, I agree. I liked their output up until Singularity 1. Everything is decent. Certainly no HU, but passable, but yeah, the vocals just don't live up to Alvestam, especially the cleans.