I think that would be horrible for her teamfighting, atleast if you don't play her tank.
More damaged oriented eve'S rely on dancing around fights, going in for some burst with E and some Qs, than get fast out again once W resets, wait for the stealth(only 3 sec) and aproach from another flank.
Skirting around the edges of a fight with eve feels great and should stay.
The main reason why eve's invis is so damn problematic is that she ignores wards.
Let wards spot her, just on reduced vision, and maybe let the vision range of both, wards and champs, scale with ult ranks. This would take her insane early pressure and alow to counterplay her with proper vision, while she still would be able to dance around fights with the stealth and be a dangerous flank as it would still be hard to ward vs her in the late due to reduced vision radius of wards.