Change the skill wheel.

It shouldn't be too easy, but some limitations are necessary. However, it shouldn't be too rigid either. Suggest your own option, but I disagree with the requirement of a pendant.

Besides the pendant, I don't see any other acceptable options because the pendant is ideal: it provides both complexity (finding it) and flexibility (it doesn't impose a rigid progression path), and we don't get a skill point (SU) in every game, and it's generally logical: SU is the 4th perk, so it should require the 4th level of skill. Furthermore, in the original game, the pendant is a relic, but it only gives +1 to the skill (SU can be taken without it), which is completely inadequate for a relic.