To sum it up: It would be great to have more early viable options, like a Gregtech biofuel produtcion around the lv/mv age, and a recipe to the nuclear reactor.
Since GT still depends on IC2, you should still be able to do biofuel the IC2 way.
What's overpowered about tree farms? I dislike MFR because of how unbalanced it is so I don't use it but the tree farm I use right now is run off of opencomputers robots. There's simply no way to run an EBF without automated energy and there's no automated energy outside of tree farms and lava. The notion of tree farms and lava being overpowered annoys me because that's like saying "if you aren't constantly energy starved the game is broken". If you can't do automated energy then you're pretty much just sitting on your hands most of the time waiting for things to get done. That or manually cutting trees, hunting for coal, or hunting for oil. No thanks. I'd rather play smart than play hard.
If you're not using any mods with easy, automated tree-farming, nothing is OP about tree farms. However if you have farms that magically spawn full-grown trees every few minutes and cut them down and create steam from the wood or charcoal, its common to see people doing this in the late-game, because there's no reason not to.
I'm in full agreement with you that playing smart is better, which is why I don't want to nerf tree farms in every respect. They have their place, which is the early-to-late steam age. But running a nuclear-age society from tree farming is absurd.
My goal would be to leave tree farms alone in the early game, or make them even better than they already are. But if you try to do too much with them, they start to clog down your industry.
Have been away from GT for a while, does this modified version of gt supports direct IC2 cable input now? (since there is already RF support)
Edit: all right it's still the same, could you make it works at least with aroma1997's classic e-net modification?
I can't even imagine how hard it would be to try to adapt to Aroma's e-net :\ I believe Blood as set up a config that lets you completely disable IC2 cables and just use GT ones however, which is similar enough (lossiness is back, and wire-fires, etc)