Hiding abilities within brush that should logically reveal your location

Dear Riot: Was reading https://boards.na.leagueoflegends.com/en/c/gameplay-balance/N49U0u4b-psa-attacking-whille-in-bush-reveals-you-and-everybody-in-the-bush and someone brought up Nunu's channel-ult-inside-bush technique. Personally I think it's ridiculous that you can hide a technique that's larger than the bush inside the bush. Imagine you're laning against a support and not doing well. You move back and camp the tower to stay safe and get your farm, when suddenly you take half of your health in damage and get stunned, followed by a slow and some more damage you can't dodge because, again, you're stunned. You are easily run down and clobbered to death under the tower because Sion is a tank and can therefore towerdive. How were you supposed to counterplay that? Sion's Q is supposed to be a melee ability, so why can he cast it much farther than his melee range from the safety and invisiblity of the bush?

To further the goal of making attacks from bushes both more fair and more intuitive, I have three suggestions: 1:Make projectile attacks flying out of (or into) the bush reveal their caster (or their target, in the latter case). 2:Make channeled attack zones visible even if their caster is not. 3:Regardless of whether or not you decide to implement the first two, give us some clarification about exactly which abilities will reveal you if cast inside a bush!