I think the idea of making a melee bot lane is... okay, but I think its inexcusable to take a champion that people already play and completely change the role that its used for in real games. Imagine if they decided lee sin should be an ADC because hes too hard to balance in the jungle so they changed his scalings to all be ap and sent him bot lane with ranged fireball autos. Would that be a fun ADC? probably, but you are stealing him from the people who already play him and giving him to another role.
So while I agree that they should try to shake up the meta a bit, LCS players already often have their ADC solo lane while the top and support lane together, I think they should do it with a new champ, not one with an established player base.