Hi hi, GregoriusT! I really like your GregTech mod and has been doing extensive testing in SSP and SMP with lots of other mods and had come across a four things.
1. I've noticed that the ore dictionary of the chips/circuitboards/electron tubes is a little more of a hassle to look up the recipes. Is it possible to have the option to disable that and have the default recipes like it was before, if some people don't want that?
2. the ore dictionary for chips/circuitboards/electron tubes are made completely different ways like buildcraft power for their gates when building some IC2 blocks/items, which can be a headache for some.
3. The new items in the newest version has a drop after hitting it, even while in creative mode. Bug?
4. With mystcraft mod and having the eternal storm age, the lightning rod can be exploited to having infinite EU. Just pointing out if you're fine with that or not.
So, there's of what I have for what I come across. I'll still be enjoying of playing with GregTech mod with IC2 and lots of other mods! 
- Soldjermon