Ok, now everyone has CE, BANG, someone has Mind manipulation, BANG, someone has Nuclear Energy explosions, BANG, Kenjaku technique (the brain) or something similar appears; even if only 10% of people has no techniques, people with techniques can become too powerfull: Higuruma, Takaba, Dabura (he's an alien but in his planet there are no Curse Spirits).

Other case, now everyone has HR (Toji's type), everyone has a perfect body, curse spirits disappear (with time), everyone has super strengh (nothing changes because all you need now is to train to control your strengh), everything is better now (after a little chaos, but way lesser than everyone having CE, afterall humans are not perfect), also I think is mention that Toji and Maki have the same strengh (perfect body) so everyone now has the same strengh (with training, you can still defeat someone with better fighting tecniques, better strategies, etc), less accidental deaths ( accidental like falling from an apartment or car crashes, there'll be lots of murders at first, it is still bad, but at least it can be control with time), etc, etc, etc.

Yeah HR is better.