Reverting supports to counter-balance the high-damage gameplay.
Not completely reverting, but reverting the %shield and heal power along with certain shield nerfs. Since the game has lots of burst damage from abilites, items and runes to even massive ignite buffs and massive heal nerfs; it would make sense to bring back burst shields.
This is also a good time to potentially look into making more tanks stronger against burst, too.
It IS preseason, there's no harm in trying this out.