So just like how you add more modifiers for the tools. I was wondering if it would be possible to have like a secondary xp/ threshold to allow more than one tool Embossment later on

That's actually an interesting suggestion. I'd rather have it as a separate application of TTL though, meaning you either get modifiers or embossment slots. Anyway, I don't think the current implementation of embossment can support multiple, and I don't have time to look into it further.

To be fair, this is the mod that allows you unlimited modifiers effectively giving you every modifier, traits being imbalanced is not that much different.

That is what i was thinking. And how would it become and AIOT? all embossment does is add the traits of the other parts. Ex wriable, duriate

One embossment per tool part type would probably make the most sense.
It would prevent creation of an "all-tool" that has just every trait there is and with that at least some balance remains.

Fair enough. Would take a very long time to level a tool anyways.