Do any of these define a base and have you noticed the use, or lack thereof, of snapcraft generated wrappers being set for command entries?
For the ones I posted any that say (use-lxd) are using a base, those that say (lxd) are not. Is there any specific use case you want covered?
The question, to be more precise, was more in-line with asking if you ran the ones that you built that use bases to verify the fact that the lack of a wrapper in some cases did not break them.
3.9.2 is now on candidate fixing a couple of issues, most prominently, one relate to manifest generation when stage-packages were used with advanced grammar.