Regardless of how this works out, Riot I commend you for trying to change the meta.
Making Mord step up to debunk the ever powerful and always needed ADC in the bot lane is a frisky move and I like it.
From what I can see, Mord will be required to play safe, but he has many tools to control dragon and control the bot lane, like the dragon ghost and the full exp from minions. With this he might be viable in the botlane.
Lets see how this pans out!
P.S. Purely speculation, but in the short video about Mord, when the dragon kills a minion, Mord gets a significant boost in speed, meaning that he might get a boost after he kills anything. This will help with the kiting.
top finally becomes acceptable?