Import as a non-standard character doesn't look good to me because probably I'll loose some capabilites such as lip-sync.
What I have shown is a Standard CC3+ Base Kevin from CC4 converted to Standard CC3+ Kevin compatible with IC7 and CC3 (compatible with SkinGen, lisync... etc).
Again, there is a LOT of steps though and I could list them if you are interested (no 3DXchange involved only CC3 and CC4). Otherwise it does not makes sense.
Do I have it right that the characters from CC4 DO import without problems in iClone 8?
Yes