If a removable front plate is impractical from engineering view, perhaps some type of wired connection to iPad/iPhone, etc., for remote head purposes would be great.
I think a > 1 MB Favorites List may be problematic from a backwards capability standpoint, assuming this would b x36 Sentinel "programmed". If that > 1 MB FL is created for the new scanner, it wouldn't work for the x36. So unless the x36's are upgraded some way, you are still doomed to multiple FLs for that "huge large" system.
I like the notion, if there is one, where x36 and later model scanners use the same Favorites Lists. A lot easier on the brain. (Uniden has for the past several mobile models, kept the cases the same size to make life easier for mounting.)