The AP / Utility scaling problem discussion
IMPORTANT: I'd ask you to like the post if you think the conversation is worth continuing and NOT if you think my ideas are good or not. That's what the poll is for. This way we can keep the conversation going.
This season introduced utility scaling with AP on supports, making them have better scaling (mostly only on MS and slows). This was so that supports could feel better with AP, but it actually didn't help a bit. This caused Lulu to be played in top lane again, with obnoxious amounts of slow, shields and MS scaling as she increased her AP. What riot didn't see is that as those supports bought AP, they were increasing both their DEFENSIVE (MS boosts, slows, shields, heals) and OFFENSIVE (damage, slows) capabilities. The utility scalings can't be good enough because they are increasing attack and defense at the same time, which is something that should be avoided, as it can become really snowbally (look at riven or mid soraka for example).
So what can we do to solve this? First of all AD and AP scaling on defensive things such as heals, shields, slows and MS boosts should be removed. There is no reason why just by stacking AD or AP you should have all you need (attack and defense). There should be a choice given to the players to spend money on defense or attack, depending on their needs. Thus the base amounts on shields, heals, MS buffs and slows should be increased to compensate.
Now that we have removed the problem, we need to give those champions a way to scale in the places they think is appropriate. The most appropriate solution IMO would be adding specific niche items that scaled those abilities separately, thus giving more choices to build champions with some sort of utility. These are some examples of passives you could give to those items:
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UNIQUE passive: Increases the duration of your CC by 35% This could be inserted in a somewhat expensive item that isn't gold efficient (or maybe in a support-only item). This would be a way for supports and champions that rely on their CC to counter Mercury's Treads (note that Mercury's Treads would still be useful in the early game and to counter this passive)
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UNIQUE passive: Increases your slow and MS buff amounts by 50% This one I think would be perfect as an additional passive for Zephyr. This would help the item to be more used among champions that have MS buffs or slows and like to have the advantage of mobility.
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UNIQUE passive: Increases heals and shields by 50% Spirit Visage has a similar passive, but it only works on yourself, which makes the item not worth on a support. I'd change Spirit Visage so that it incorporates this passive. Also remember we had removed all AP scaling from heals and shields, so it wouldn't be as abusive as it would be on live. You may think this would make this item mandatory for healers and champs that use a shield, but I think it would only be picked if you need to increase shields and heals, as it doesn't give any offensive capabilities.
These are only some ideas that I think would make supports feel better, reduce snowballing potential on champs with heals or shields (swain, riven), and increase the number of Meaningful Choices players have to make. Feel free to discuss anything about this problem, give your own solutions, or point out any kind of errors I may have made. Also I'd love it if someone from the gameplay team at Riot could give me some feedback on these ideas.

fear was based on AP,
revive window increased based on CDR, or if
ult radius scaled with current or max health.