I wouldn't say Surecast useless, especially in PVP but I feel like it's kind of underwhelming to use. It doesn't provide any visceral benefit. Like...think about it compared to Swiftcast. You see Swiftcast work, your spell comes out instantly, a little differently than when it's cast normally. You just don't feel Surecast being used. It's a very passive and uninteresting benefit for a cooldown, even lower on the totem pole than something that would just flat out increase a single stat for X seconds, in terms of design.

My thought is that allowing it to let you cast by moving would alleviate that, at least. Give it some tangible, visible benefit that makes it feel good to use. But I won't press further down that tangent since we've already had our back-and-forth on it.