/3/ - 3DCG

Guys, what's the proper method for reusing a rig on a different mesh? I tried googling 'rig skinning' but found nothing helpful.

I'm making another character for my game which will have different proportions (taller, more muscular).
I used my base mesh which was the logical thing to do, scaled it up, sculpted some parts. Applied All Transforms on the mesh.
Then I roughly moved the bones to fit the new proportions and parented it to the rig with "Armature Deform" (thought this option would be the best to avoid redoing the weight painting). So far I did some quick tests and it seems to be working.

Do you see anything wrong with what I did? Maybe I missed some step that's going to give me a headache in the future? I just hope I can attach new equipment and shit without too much hassle.

Also, would it be possible to copy new animations across armatures? Like if I made some new action on one or the other armature, could I transfer them? I just want to know if I should add more generic animations to my base rig before starting with new characters.

tl;dr: 1) how to reuse rig on another model with different proportions // 2) can you copy new animations across rigs?