I've seen many people on the boards discuss the problem of damage creep (the idea that champions base damage stats have been ever increasing), but I think another problem that seems to go unnoticed is what I would call attack speed creep.
I don't think it's just the increase in base damage that is the issue, but this, coupled with more and more Attack Speed items, buffs, passives, that is causing champions to deal massive amounts of damage not only late game, but also throughout as well.
A very good example would be the item Nashor's Tooth, and passives like Jax's (which stacks percentage attack speed, up to 8 times... sounds too ridiculous).
Just something I've been thinking about. Thanks for reading, and let me know what you guys thoughts are on this, as I'm very curious.