Morello, let's talk about Veigar and Trundle
Pretty much all AP champs have CC (a couple don't, most of them do), but most of the hard CC in this game is either an ultimate or a skillshot. Veigar gets it at level 1. I also can't think of a single AP champ who gets more than 100% of their AP in bonus magic damage on their ult. Once Veigar hits a certain level (somewhere around level 12+) it's basically a free kill. Even if you deny him in lane, he still scales way too hard. I feel like there is very little counterplay to Veigar, and the counterplay that does exist is extremely expensive. He can pop banshee's (which is like 2600 gold) passive with his 'q' and then you take full ult damage. And as I said even if you deny him in lane he still hypserscales. Zero counterplay. Nerf this please.
I am aware that champions are supposed to have counters, but the number of champions Veigar counter is just ridiculous. Trundle is the same way. Anyone who builds armor or health is auto countered by him. So Trundle can build tanky and counter the enemy tank at the same time. Seems fair.

and
for their 2-skill combos (cc gated at lvl 2+), and I passed over
and
because they aren't played mid as often.
has 130% bonus damage on his ult and silence on his Q