Ouch, not really in the spirit of development and exploration...
I can certainly understand that you'd prefer to have the system used as designed and that it's design contemplates a broader use case than simply "play movies".
However, other gurus have also emphasized the modularity and personalization possible within LMCE. Perhaps the request to slim down the functionality of an LMCE install but still benefit from all the fantastic capabilities built into the services that one DOES want to use isn't so insane a request?
I mean, think about the case where users regularly build LMCE but don't enable/use the smart home or telephony functions. If the OP just wanted to get a more efficient UI experience by hiding the unused portions of LMCE then that seems fairly reasonable??
I'll bet the OP never comes back to this project.