I once played a Sprite based game long long ago called Fantasy Online similar to Rscevolution (now discontinued) , it soon became oddly addicting. But It was only through account/character growth that this game was able to draw in players to advancing deeply into different play styles and added a sense of immersive connection to Pvp and Pvm gameplay throughout..

One aspect I really liked, and one that I'm sort of drawing this suggestion from was a character option(al) to ' reborn ' which basically added a further ranking to a character, allowing higher rates for certain tasks in-game. But the price was high for becoming 'reborn' and gaining these 'custom' abilities...you basically have to Max your combat stats including prayer to 'RB' the price u pay is ur cb xp resets back to 0 and your level 3 again. Skills being of course, unaffected. But you will gain custom perks to your account there and after...maybe ones like ( prayer drain rates, custom item shops for reborns, capes, armor, name color change etc.. basically whatever would be fun and new. I believe it would give long time, fully-acheived players something else to accomplish on their characters.