Before Pre-Season Patch:

Was able to start Mordekaiser W using Alt+W while right-click moving.

After Pre-Season Patch:

Not able to start W while right-clicking and moving at same time.

It only works when ur not giving any other commands.

Which a problem coz in fights u r doing lot of stuff together and find out ur W nvr started.
So far hav played couple of games and u can immediately feel the difference, tht the skill is not starting and taking lot of ur attention in fights.