There's likely no resolution to this issue because it's clearly by design, given the fact that no other MMORPG plays similar to this. Either they're aware of this and think it's perfectly fine because it's by design, or that they're afraid of telling people the lag is by design. There's really no way to fix it short of giving another 0.5s or so on any ability that is too tight. If an ability is expected to be cleared with only say 0.3s to spare (like Weight if you didn't have a running start), you shouldn't have another 0.3s of lag because then there's no reliable way to clear it by skill alone.
