Yes>How about replacing Mint App Menu (I forgot name for that menu) with Whisker Menu developed by Solus? Is there any legal or free software policy issue?
This menu depends on newer packages than in Uruk or Trisquel repositorys, because Uruk 2.0 based on Trisquel 8.0, That's mean Ubuntu 16.04, and this menu running on ubuntu 17.10 or later.