Once you've switched sides, you won't be able to use much of the original Ibu's skill set (I'm in this situation, others don't know)

A lot of veteran players actually evolve their Ibu according to their preferences. You can also see that if you are short of a lineage within the Ibuki's evolution range, you can evolve that lineage.

I've had the most trouble evolving the Light and Moon Cloths.