Some clarity for Swain (suggestion)
Upon playing Swain, realizing the importance of mana-management is one of the first painful lessons everyone has to learn. Mostly by keeping up your ultimate while in a teamfight, trying your best to zone while going directly for those tasty chickens squishies, only to realize that you('re) screwed up when your mana-bar is suddenly gone and you're helpless.
The more games you play, it becomes steadily easier to estimate the time you can keep your extremely badass raven-form up, while still being able to cast your black magix. While I love this playstyle, having to manage your resources in combat that is, it can be pretty annoying when constantly having to look at your mana bar and at how much it is declining, so you know when it would be the best time to turn it off and potentially disengage, maybe even indicating your team to do so as well. "Strategic Withdrawal!"
Of course the passive helps to keep up your ultimate, but it cannot always be relied on.
A great way to help Swain-veterans and -beginners alike would be an icon that indicates the amount of mana it consumes with every second, much like Kassadin, right at your buff-bar or R-icon. With this, mana-management during teamfights and skirmishes would be "simplified" in a good way. It wouldn't take away Swain's weakness, but it would make it better to deal with, especially when everyone around you is going nuts and you have to keep track of everything at once.
All hail our glorious leader Swain! For the age of world-domination (and dragons, Riot pls) may come!!!