You know, as much as you say you aren't happy with the vocal quality, despite some muddyness on adlibs, the overall quality is improving by leaps and bounds with each year that goes by. Your flows are becoming more and more refined. I think if you were just a bit more selective with your chopping vocals, pare down the track number just a bit, or perhaps have one lead center vocal that's nice and clean, and apply a chorus, eventually you'll get results. Keep experimenting.
The mid is just a bit heavy on the vocal, making it sound just a little nasal, but it's not overly sibilant from what I can hear on laptop speakers. Try some EQ play and compression -- by the way, check my latest post, some vocal processing freebies are on there.
Glad to see you still at it as always. Keep it up!