Considering how much I love using Lucian, I can say with confidence I'm one of the few people who know that, though The Culling IS a bad ultimate, it is, by no means, useless.
The sheer kiting potential it gives you by using it right after a W... Hell, I've escaped scot free after a warwick and a fricking ZAC jumped me. A suppression and TWO knockups, with further slows nullified by my E and further damage nullified by sheer kiting thanks to PD, Trinity and W procs with my ultimate.
Sure, I only survived the initial burst because BC + Trinity makes me a lot tankier than most ADCs but you get the idea.
Sure, movement speed isn't ABSOLUTELY FENOMENAL and the ABSURDLY GODLY STAT, but it *is* one of the strongest stats in the game to EVER have. Why do you think boots are such important items, and champions with high movspd are so few? Lucian even has 330 movspd, 5 points higher than pretty much any ADC not called Vayne (I seriously cannot remember another adc with 330 base movspd besides Vayne) and he can easily get 370 from his W without any movspd items, that's more than Vayne can say until level 6!
He's by far one of the most mobile ADCs out there, give me just a little bit of peel, I barely require any peel whatsoever when playing him, especially when my opponents rely on slows. I seriously went 20/0/21 on an hour-long match once because the opposing team had nothing but slows + Zac (And aside from the two short knockups, ZAC pretty much only has slows). I kept myself alive purely by dodging with high movspd, removing any slows they put on me and kiting the shit out of them with WR.
And raikaria, you keep saying that Lucian will always miss his ultimate and whatnot, you seem to forget that most bruisers require to be POINT-BLANK to hit him. Unless you're one of the guys playing at Saltyteemo, I think it's pretty hard to miss a point-blank The Culling, and the damage on a full-hit The Culling (By no means hard to get when your opponent HAS to chase you down) is quite scary. I took over 50% of ZAC's health with a full channel of The Culling in the aforementioned hour-long game.