It isn't about features. It is so he does not have to rely on other peoples coding ect to update his mod.
Anyway atm even if he took out all the rp2 code it seems slime void is not responding to people at all/ are extremely delayed doing it, so he could not get permission to use the new code even if he wanted. The dev behind the wireless redstone picked a very terrible replacement.
Sorry if I sound negative and rude about slimevoid but they have many, many short comings.
On a random note why the crap do people still make modloader compatible mods...