I have used Buildcraft for some time and Industcraft for 6 months. I noticed when I started a single player game on a new world that the latest version of IC2 still has a simple control setup on the geothermal plant. A suggestion I thought of was a tank like bar vertical on the left and a power storage bar on the right but updated to look like the others already have.
The other thing I noticed is when I use Buildcraft to extract items from the induction furnace I use is unable to extract both sides. I was hoping that it may get worked on so a extraction can be done with a pipe on left and right will remove the resources or a gui that can set the items to split to both side and extract both sides or something.
Otherwise IC@ is still one of the greatest mods and is greatly appreciated.