Back in Stormblood we had an issue SE did not like, that being SAM was designed around landing these great big Iajutsu hits and instead people were avoiding those in favor of Shinten spam. So SE naturally nerfed things to get people to stop that.

Well the removal of Kaiten had the unfortunate effect of bringing back Stormblood levels of viable Shinten spam: https://www.youtube.com/watch?v=tXDHt0ueL4E

Kaiten before its removal pushed for paying attention to resource management, you needed enough for Iajutsu while also not overcapping so you could Ogi. Thus Shinten was a Kenki Dump but you could not over invest in Shinten spam lest you nerf yourself on your big hits you were designed around.

Since Shinten spam was something SE did not like but Kaiten's removal has turned kenki into the Shinten Spam Meter how long do you think before they just remove kenki entirely?

SAM's mobility skills are already on a cooldown and there is the precedent of Monk's damage dealing dash before EW. The mobility skills do not need a kenki cost to limit them.

Senei and Guren are already on 2 minute cooldowns, they technically do not need a kenki cost at all, especially since Ogi the skill attached to a 2 minute cooldown kenki generator does not have a kenki cost at all.

Shinten and Kyuten could simply be given a cooldown and potency increase and they would function like similar oGCDs on any other job.

So why keep kenki if kenki management no longer exists and all it does is fuel a gameplay style that SE already does not want people doing?