Tbh, he doesn't need to be bot lane champ, it's just that in order to use all of his assets, he must be played bot lane. Damage from his W? Nobody cared about W when playing Morde, everybody maxed it last and used it more for it's defensive stats than his damage, and even so, you can still use it on your jungler when he's ganking your lane for ms buff and quick damage from detonation. The weirdest change for me is adding AD ratio to his E, but I kinda like it, I was already experimenting with building Morde as AD-AP hybrid (
) to a moderate success, and now that build of mine is going to be kinda strong. At first, I was very sceptical about him, but when I saw all of his changes on PBE, I'd say it's not bad. He is going to change his identity, that's for sure: he won't be burst mage anymore, but he will still be very strong. I'd say play him mid so he has easy access to dragons and play him bot lane only with friends in duo.