The immibis microblocks are bout 1000 times better then RP2 microblocks by a long shot. The RP2 ones are so limited it's sad, but with immibis ones you can cover almost everything, from liquiducts to IC2 cable. And what you can't cover, there is an API to allow functionality with the micoblocks.
And with redlogic the possibiliets are endless. However, will the microblocks be carried over from 1.4 to 1.5/6?