The reason Gojo said that "you should've cut my head off" to Toji was because unlike Cursed Energy, Reversal cursed energy is created in the brain, while Reversal Cursed Energy can heal most things, it cannot bring the dead back. Especially, considering that Gojo was split in half which is a very different scenario compared to getting stabbed in various body parts like Toji did. Also, it was already mentioned that his healing has become very slow because reversal cursed energy has highly plummeted, I highly doubt he is going to get revived by any means.
Also, I believe it would really go against the story to bring back the dead back, the manga really captures that deaths aren't some glorified and romanticized ending, death is just part of the life and it can come to all and it will at any moment, Neither the mighty Honoured one, Satoru Gojo can escape the shackles of his death. While Satoru's death might not be the very satisfying one, it was very much in the nature of the manga which we are reading. By the way, I, myself, don't like his death infact I kind of started crying, I was in a somber mood for straight two days because of his death.