...being in Tohei's, Tomiki's or Shioda's lineage today guarantees… nothing. Just like being part of the Aikikai umbrella guarantees nothing (good or bad)...
If you are really interested in ki/kokyu, as a fellow student I suggest you look past the whole organization/style thing and concentrate on players/exponents. Go out, feel people, both inside and outside your style and inside and outside aikido in general.... It's better to be pragmatic as that might lead you to the best training and learning.