wc3edit.net

yes

Made a command that set your role to biggest role and enable u pick anything u want.
Not sure if is working because i didn't tested, so test and give me a feedback.
Also i probably fucked up with map skins or it has a custom skin pack beucase it shows green boxes as every model.

It works for some characters but why can't i pick mordred or scathach?

Probably because they are not avaliable yet, i looked on special character selection and took the privileges that each nickname has and added it to "-vip" command.