For Displacer the obvious solution is to make his normal Teleport more viable by reducing the recovery frames. -19 is a good number (that's the same as in MK9, right?)
Master of Storms is more tricky because the orbs are quite powerful already, it's just that this variation is under represented and hence, under developed, simply because TG is so good. I think the correct solution would be to buff it in such a way that it becomes more viable, but in ways that are different than TG so people would have an incentive to pick the latter over the former. Initially I was thinking that giving MoS the same, or even pre-patch, F1, 2 might have been the solution, but TG has that as well, i.e. it wouldn't really provide any benefits over it.
So now I am of the opinion the best thing to do is to buff his orbs somehow, or even give him a new orb move, such as Revoloving Orbs for example. That would be a move where an orb or two literally revolves around Raiden for a short time and protects him from harm or deflect or absorbs projectiles or some such. Another interesting orb buff might to allow three orbs on the screen at the same time and all three of them form a triangular beam. Either that or single orbs should have some effect on the opponent, like maybe drain a little bit of life or meter or stamina. In that way, the opponent could still walk right through them and keep on with his attack or whatever they were doing, but it'd cost them a little. The point being, a single orb shouldn't be completely harmless.