Cup provides a 10% experience bonus... hardly "overpowered"... and particularly in comparison, a 2% bonus to experience points gained is absolutely trivial. Even moreso when one weighs the opportunity cost of this talent - instead of 2 extra XP for every 100 XP you earn, one could have +1 PV, or +2 Speed, or +1 DV- none of those being particularly irrelevant, particularly in the early game where survival is most difficult, and all of those opening up several worthwhile talents down the line. Please fix these talents and make them worthwhile - indeed, while I'm not saying every talent should be equal, every talent should have a use and a purpose, such that some people, at least some of the time, would want to take it. No one in their right minds will take either of these talents at present, for any character build, not even trolls. That is a problem. There are many other talents that have this problem. It should not be the case that so many people say that only a few select talents are worth taking. Honestly, how many people are going to take "Strong Kicker", outside of noobs who don't know that it's useless? The fact that we only see a few specific talent trees over and over again on winning builds is so dull and boring to me, frankly.
Specifically, though, I suggest that this talent provide a 10%, minimum, bonus to experience point gained, with Great Learner making it 20%.