Factorization was popular once? As far as I know it was only used for wrath lamps and barrels and sometimes for the router. However I think that factorization still has potential, those ancient sentinels for example are things I have not yet seen, now if only they would get a good AI instead of just dancing.
As for industrial craft I just hope they get a better energy system soon as right now it seems to be just rf.
Eu came first, Eu has loss over distance... It's just been made simpler as of late.
But IC3 needs to do a lot to make it less stupid, adding more crafting stages/processing stages =/= fun IMO.
If there were different things for different types of ores (e.g. iron needs a low temp furnace, gold needs medium, etc.) and better ways to speed up machines (think advanced machines mod)... then MAYBE it would be unique and worth using. But right now IC3 seems to be torn between 3 ideals:
1) IC2 - Keeping it pure (as in, how IC2 was when it first came out)
2) Gregtech - Gregging up IC2
3) Simplicity - Everyone is getting used to simple mods (RF mods), so they don't want to annoy new users who entered into the RF age as their first modded experiences.
2 and 3 conflict. 1 and 3 conflict. 1 was fine at the time, but lack the features needed to compete with the RF tech mods of today. 2 was always something that divided people. And 3... well... I won't talk about that.