Honestly the AI needs to be looked at overall. I know that DE wants to avoid AFK playing, and summoning specter aimbots kind of does that, but they are terrible. Kubrows, Kavats, Specters, Wukong clones, etc. They cant hit anything, make terrible decisions, and are basically meatshields. Given how fast we move about the map, they don't have time to casually target something and waltz over to melee it. Kubrows and Kavats should be way faster imo. They should be able to outrun grineer and chase down whatever they're after. The specters don't have mods, so why is their aim terrible? We know the damage will fall off quickly anyways given the scaling.
Oh and remove slash dash from Umbra's AI. All it does is launch him off the edge.