Now that DFG is being removed, Mordekaiser will be nerfed even more
DFG is being removed in 5.2, probably because of the problems that the item has created in League. It makes champions who can already kill you in one spell rotation kill you with half the spells needed (AHEM FIZZ, ANNIE, SYNDRA, KATARINA, LB). I always buy DFG early on Mordekaiser, because he really needs it to kill anyone. It's core... at least I think it is on him.
We all know Mordekaiser's weaknesses... no CC, no MS steroid, no dashes/gapclosers, low range (Mage-Melee). With all of these combined, it makes it really TOUGH to finish off a target if they run. Let's say you start a fight with someone, you start winning the trade, they can just walk away, CC you, dash away, and they'll be fine. The reason that DFG made Modekaiser somewhat viable, at least in my experiences, is that it ensured you would at least get one kill before you died. If you would ever find a way to get into melee range of someone (don't expect to get close to an adc in teamfights), you could DFG + full combo to kill them and get their ghost BEFORE they could run away. Without DFG, I find Mordekaiser's damage to be very lackluster, or at least his burst. After using Mordekaiser for over 300 games or so, I know not to go into teamfights or any fights without DFG and my ult up. He needs it... it's pretty essential to him.
So, if they do end up getting rid of DFG without bringing in a new item to compliment Mordekaiser, they need to buff him. Even now, he still deserves buffs. He's been over-nerfed way too much, and the only reason for this is because he used to be a complete terror. With all of the mobility and CC on every new champion and updated champions, he would be balanced if he was in his old state. Buff Mordekaiser, and get his rework out before DFG is removed.