First of all Greetings! I have been using the blender plugin since February, there is no problem except that we can only give 1 argument to the armature in skin animations. My observations are that it gets better with each new update, the last one was EDM_Glass material as a direct shader node, I think they are working on mirror as well. but you can create mirror and glass even if it is not as a shader node. (tested and confirmed)
But there is no channel to report the bugs we encounter, if I remember correctly, I wrote to NineLine and BIGNEWY a month ago about the bugs I encountered. but some of these bugs still exist (in the case of skin animations)
In my own projects now, I can use IK, bake emtyp's to make perfect landing gear animations etc. It took me a lot of time with trial and error to learn them and make them work properly in the plugin.
I would like to prepare a training document/video about them after the problems with the skin/bones are solved.
Here you can see my first completed PC-7 in full animation for testing purposes