The only frustration I have with Limbo is DE seems tireless in nerfing him. If that sort of buff isn't sufficient, I don't know what to tell ya.

The single most obvious use for Limbo is the fact that a press 4 frame can massacre enemies while being invulnerable & constantly regaining energy, which allows Ash alone to carry even a Lv100+ survival by pressing one key, without fear of blade storm's ending lag getting ya down. But he simply doesn't need it. I play Limbo because he's so complex & I actually have to think seriously about what I'm doing to get the most benefit out of him, & if most players aren't willing ot put that sort of thought in that oughtn't translate to coming over to the forums with 'This isn't good enough DE.' I enjoy him because playing as Limbo is the few things in Warframe for a veteran that still makes me think 'Oh, how do I this?' & that's able to happen because Limbo is so versatile that he has effective strategies for most situations without any of them being 'Press 4'. Most of the people who recommend buffs here pay absolutely no heed to Limbo's complex nature & recommend only alterations & overall new functions which would make him much more straightforward to use, rather than anything to compliment what he is already. As someone who mains Limbo, I'd be the first to say I'd like to see the guy buffed a bit.

Limbo stick