Solarian Electrical Attunement Revelations

[Voxram]

I've been trying to figure out why the stellar revelations that enhance the initial revelations for the Electrical Attunement alternate class feature are at a higher level than the ones for Black Hole and Supernova.

Implosion Shock and Back Blast are available at level 6 and modify Black Hole and Supernova in some way. But similar revelations Grounding Sink and Paralyzing Storm that would modify Energy Sink and Destructive Discharge require level 10.

Grounding sink has the potential to give temporary Hit Points and maybe a bit stronger than Implosion Shock or Back Blast, but not enough that I would have thought it'd be moved to the next level block. And Paralyzing Storm has more options, but it's a similar effect to Implosion Shock without the damage.

I've been struggling to wrap my head around this and would appreciate any help, thanks!

[Xenocrat]

Back Blast has trivial to useless effects unless you’re surrounded by multiple foes who are burning. That’s not common.

Implosion Shock will do nothing if they are or move more than 5’ away from you after your Black Hole. Presumably they don’t want to be adjacent to you and will often move away before you can full attack them, making the ability often useless.

I don’t think the 10th level ones are great, and they do rely on failed saves, but at least you get something some or most of the time.

Of course the real reason may be that the two pairs of abilities were published in two differing books, probably written by different freelancers and edited and approved by different developers, may have written the second pair without knowledge of the first, and just didn’t think about it deeply. In any case the 10th level pair were published first, so the question is why are the latter ones 6th, not why are the first ones 10th.