In the 90s anime, his evil was greatly toned down compare to the manga, and sacrificed himself for Usagi.
In Crystal, while most of the villains follow their manga plot, he was given another heroic death.
In Another Story he was redeemed and gave the senshi the important Rose Crystal.
In musicals they also let him get redeemed.
I think in the manga he was given some development, more than most of the other villains, but the ending was a bit rushed. So maybe it's one of the reason that adaptation treat him nicely?
In Crystal, while most of the villains follow their manga plot, he was given another heroic death.
In Another Story he was redeemed and gave the senshi the important Rose Crystal.
In musicals they also let him get redeemed.
I think in the manga he was given some development, more than most of the other villains, but the ending was a bit rushed. So maybe it's one of the reason that adaptation treat him nicely?