ok so rogue can steal so many powers that her builds are inifinte but her Ultimate and signature are set and while her signature is made for energy users her ultimate is made for her melee build....
here is my suggestion.
first you make her signature have the 3 box choice like Dooms has for specialty of which way she is built
first box is for melee, second box is for ranged, third is for summoner
the choice you make there changes 4 things on her...
first if you pick melee it uses her current Ultimate except you change the psylocks butterfly's to her psychic katana BUT her Signature changes completely to be Rogue flying in a circle really fast doing physical damage punching everything inside of it while immune to all damage and crowd control for its duration. it would also give her back 50% of her health and raise her defense by 35% for 8 seconds after its done with a 30 second cooldown on the Signature.
second if you pick ranged you get her current Signature BUT her Ultimate will change to stolen X men powers that are ranged like Havocs pulsing blast, Cyclops optic visor off, Psylocks mental butterflys, Jean's pheonix blast, and Banshee's scream placed on your bar with 5 second cooldowns for each power and the Ultimate last for 50 seconds. All her attacks would generate 5% of her total health per hit during its duration.
third if you pick summon you get a Signature that calls in Gambit and Nightcralwer for 15 seconds doing aoe attacks at the location of your cursor and their damage is based on your summoner bonus damage. Your Ultimate would boost the damage of all your summons by 500% for 30 seconds and make them immune to all damage during that time.
fourth if do no specialize by choosing one her signature will be a buff that heals her full health and raises her crit rate/damage for 10 seconds with a 30 second cooldown with her Ultimate similar to Captain Marvel's powers to match her tree based on those powers.
when you choose which you use it locks it that way until you reset your power points, switch to another build, or prestige.
I realize it would be extra coding but currently the Ultimate she has is useless to people with a ranged/summoner build and her signature is super weak for those that build her melee. Rogue is suppose to be the all in 1 hero you can completely customize but the customization stops when you want to use her Ultimate and Signature both in your build.