I am really looking forward to being able to play my Online character in singleplayer like you could with the Rockstar scene director pull and Menyoo mod in GTA 5. You can play a online character using the Lenny trainer and Outfit changer already but you can't specifically use your own online creation yet and you have to clumsliy play with one of the ugly presets whereas in GTA 5 with the Menyoo mod, not only could you play your creation but you could also further tweak the character's features using sliders without having to visit online again. I don't know if Lenny's trainer will update to add this or whether something else will come along but I am certainly looking forward to it as it was my favorite thing to do in GTA 5.