I wouldn't call it a "Mickey Mouse" setup, but you do lose some things with a module vs. a native system radio.
1. ModelMatch only works with the native systems.
2. ServoSynch only works with the native systems.
3. The new DX-7SE as well as all the 9 channel and above tx's run in 2048 rather than 1024 resolution
when coupled to a 2048 capable rx.
Seems like there's something else but I can't remember what right now....