Maybe this has already being suggested if so my bad but i would like to see pipes added that behave a bit like the BC pipes.
The pipes would be able to carry fluids and blocks and be compatible with tanks etc.
So far there are a big lack of pipe mods that do both things and it would be great to have it part of the mod itself.

There is a PR open for this (#2266). It is not ready to be merged yet. Hope it will be ready in future.