Just got interested in SAM, so I've been trying to learn their abilities names, costs, etc.

Is there really nothing to spend Kenki on until Lv52 when you unlock Kaiten? I mean, it's only 2 levels, but that pretty much means your Kenki is useless in any of the ARR dungeons/trials. that cap at/below 50.

Does that not feel kind of odd? Maybe I'm just not looking at it the right way, or I'm missing information. It just feels odd to have half of the core mechanics gated behind being such a high level.