Hi, as both an avid player of warframe and more recently spacelords, I believe spacelords can benefit greatly from taking from it's contemporaries. to be specific I believe a series of perk cards should be gradually rolled out for each character unlock able at a low level which change behaviours of the specific character to add more variability in gameplay.
an example of such a card would be one for Ginebra "Metamorphisis is on a 10 second cooldown after returning to humanoid form, Ginebra can perform finishers and tackles while in cougar form"
these types of cards would be harder to balance but in the name of bringing more fun and diversity, they should prove worth while. they could also be used to roll out major reworks to a character in the form of a card for testing purposes.