Hey Phlox, I'd like to mention one thing that I think is worth considering re: new mage itemization.
When playing some champions like Xerath, building Luden's virtually always leaves the casters with ~10 HP if you're building normally. Even if you prioritize AP first and heavily delay boots, the minion hp keeps scaling alongside your damage and leaving it just outside your threshold until you get fed.
It ends up making it feel really, really bad to play just in general...unless you build Liandry's.
The problem is that, while it does help differentiate the two. It feels bad that Luden's damage proc applies to the melees instead of the casters, when you were already going to use extra abilities to kill the melees, but didn't have more for the casters.
For example: Xerath Q hitting the full wave but proc'ing Luden's on the melees and leaving the casters at 10 hp each. It feels really, really bad, and makes Luden's feel almost like a troll item compar...