Well well, something drastic has happened. But let's speculate what changes will be made..
Currently if morde botlane is going to the test pilot for new-meta botlane duo he is lacking a few things.
Almost EVERY adc buys a dorans blade, some champs use this tactic to great effect, like draven and vayne. I really doubt morde can handle the harass from two people because his skills costs health. But again, the VFX changes on his E might mean something that is in store.
2nd: sustained damage and objectives
If you get the adc role, it is crucial that you deal sustained strong output damage from a range. this also applies against towers. i seriously wonder how a melee champ can manage this and again, his Q isolated damage or E (Hence the name siphon of "destruction") looks real suspicious for a change to combat this problem.
what do you think guys?