Yea, that's what I said, he has minion advantage, aka pushing. And that's what I said, the best option is to gank him, and that's not good gameplay design. The problem with morde is he HAS to spam E, because he makes no use of this passive if he doesn't, and is easily harassed or all'ind, especially pre 6, without it.
And pretty damn pathetic? Really? 70 / 115 / 160 / 205 / 250 On a 6 second cooldown with 700 skillshot range is pathetic? I'm not gonna call it good but I wouldn't call that pathetic at all. I'd look at syndra Q if you want to see pathetic. Keep in mind he's getting a shield on top of that, 35% of the damage he put on you, and that's not counting if he hits minions, which 9 times out of 10, he's going to be. That is precisely the problem with his spamming, it's extremely difficult to punish it. And as far as AP ratios are concerned, he's sitting at .6 on that E, which is on the low side.