Riven QOL fix
It seems to me that riven should be able to use her E while snared. There are many cases where Riven's E doesn't actually allow her to move (i.e. running into a wall) so I feel it doesn't make sense to think of it as only a movement skill. Of course Riven would still be stuck in place, but the shield would be applied and that could help save her from lux, morg, etc.