Since the Skill update, I almost want Skill to come back for Battle runes. Originally people made Battle runes to up their heroes damage, which also affected Burn and Poison damage. Now Skill affects those effects, so newer Battle Runes wouldn't be as effective as older ones on certain heroes.
Perhaps we could have events where for a limited time, we could craft special types of runes - Like runes that give Attack and Skill that aren't Vampiric runes, or Light/Blue runes that grant Attack, or Red runes that grant Health/Defense.
I know that idea might upset people as it could make heroes like Icepick and MK even more powerful, but if everyone has access to them, doesn't it really change that much? Also imagine a Furnace with full Bulwark runes... *shivers*
Favorite hero: Hansuke
Currently: Waiting for new PvE content and the PvP revamp.