Not disagreeing that those don't exactly feel like offensive "rotational kit" or the like, but...
I kinda feel like those skills offer more to the the feeling of the kit than a pure dps button would, because of that bundled healing.
Ultimately, you're --in the balance of things-- sacrificing maybe 20-30 filler attack potency (20-30 per filler attack in 100% offensive uptime would be 440-660 potency per minute, or 293-440 potency per Assize's CD) in order to divert that damage over to this tool balanced at being used nearly on CD, but that healing component leaves you a little something more to potentially leverage skillfully by occasionally NOT hitting it on CD (because the damage event isn't every 40s and the healing component would otherwise go to waste). I... actually really like that.
Granted, much like whether oGCDs provide any noticeable alternative to that otherwise over-repetitive flow of filler spam (that I... haphazardly... discussed above), that depends on their contexts. If you'd never have any real benefit to holding onto Assize briefly (because you wouldn't need to use Medica/M2/C3 anyways even if you wasted the heal), then that difference won't yet add anything.
I feel like those are important skills to have for that reason though; they make great indicators as to whether requirements are too low or making each other too redundant, etc.