Originally I suggested that REIFY of an isotope would give its plain form, and you would META it if you wanted a quasiform:
But that's not a full coverage answer.
An operator that takes everything "one level up", where isotopes become quasiforms and everything else gets a quote level added.
>> true == ~true~ ; isotope >> meta true == ~true~ >> meta 10 == '10
An operator that leaves non-isotopes as they are, but turns isotopes into their quasiforms (and I think this probably is best called REIFY):
>> true == ~true~ ; isotope >> reify true == ~true~ >> reify 10 == 10
An operator that leaves non-isotopes as they are, but turns isotopes into their plain forms:
>> true == ~true~ ; isotope >> something true == true >> something 10 == 10
Specifically for ACTION! isotopes being turned into plain actions, I used an interim term UNRUN, but that's pretty awful.
Making things into isotopes is done with ISOTOPIC:
>> isotopic 10 == ~10~ ; isotope
It could be a refinement to REIFY, like REIFY/PLAIN. But at that point it could be two steps that might be clearer: NOQUASI REIFY, where NOQUASI would be like NOQUOTE and not complain if the thing you passed it was not a quasiform.
Maybe... CONCRETIZE? That sounds like it might do a bit more work than what REIFY does :-/
>> true == ~true~ ; isotope >> concretize true == true >> concretize 10 == 10
It's not awful. Main thing is just to have a name for it while the gears turn. But as usual, throw out suggestions if you have them...