Just finished my first playthrough with EET and various other mods. For the most part it was relatively bug free. I did feel a bit OP in BG2 although not in TOB (Ascension I think was really kicking my butt hard?).
Couple of bugs I did note:
* Breakable weapons mod continues through SOD, BG2 and TOB. This almost caused me to have to quit Watcher's Keep as the fallen warrior's spirit's sword kept breaking while he was under my control - he couldn't kill anything only knock things unconscious so I had to reload until by chance I managed to make it the full way through without his sword breaking. I don't think I install in next time unless there's a way to limit it to BG1 only.
* Some weird things with Imoen's thief levels in BG2? She ended up wayyy overleveled compared to my main character so I ended up doing a fresh import into BG2 which fixed her though.
Anyway just wanted to say thank you and hope the list of compatible mods continues to grow.