Suggestion for implicit only skills

I know it's by design that some skills like Volatile Dead only come implicit with certain item bases. But I feel like this really limits build diversity and doesn't allow focusing on that skill in the same way:

• no Prism of Believe

• level 20 skill gem needed for 5th support

• no +1 corruption

• forced to use an often shitty base (this becomes even worse with uniques like the unborn lich)

• this often just boils down to additional skill levels from gear just being mandatory and need to be toned down eventually

My suggestion: give us a gem extractor currency that destroys an item to extract an implicit gem with the same level and gem slots. The gem would be a new gem type that cannot be leveled by uncut gems and jeweller's orbs cannot be applied to it. You can still corrupt it and the skill gem would have a mana cost or spirit reservation assigned. This probably should only be applicable to skills of non-unique items even though I think some skills could really benefit being available outside of the shitty unique the are bound to.

Also I think those skills should be added to the Prism of Believe mod pool.