I'd probably use SAM Yaten-Enpi religiously to get out of small AOEs or whatever if Yaten didn't cost Kenki.

I'm not at the stage where I can use Kenki reliably yet though as I'm still on level 50 content, but I imagine if Yaten didn't require resources it would make that combination useful enough that I'd use it. Even if it's only to look flashy. :P