I, too, saw the latest Sky video. Number one League comedian, in my opinion.
But a commentary about Lucien, since he's the new kid on the block. Having tried him a few times, I agree with the opinion that I've heard bandied about by the AD streamers who tried him out stated: his passive and laning is extremely strong. His fast-delivery sustained damage (an ugly term, to be sure, but it's slightly different from "burst" in the traditional sense) with a three-ability, three-passive chain beats basically everyone else in the game. The problem is that he gains extremely little at level six, meaning that people like Graves, Ezreal, Miss Fortune, or Quinn pull ahead of him in kill potential if he hasn't abused the double-shot nonsense beforehand.
Also, I disagree that his dash is strictly worse than Ezreal's teleport. The fact that it cleanses slows can be immensely powerful, even if it's somewhat situational in doing so. Being mana free at max rank also makes it situationally superior, as it prevents death-by-oom scenarios. Its chase potential is also superior, due to the lower base cooldown. (Though, again, this is situational. Blue build Ezreals can afford much quicker Arcane Shifts, due to their high CDR. They, as noted, will lose a large amount of teamfight damage compared to full AD or even Trinity Ezreals.)
His kit has extremely high synergy in general (slightly lower mobility than an optimally played Ezreal, but probably slightly higher damage due in part to his superior base stats), but the ultimate really breaks his top-tier or competitive usefulness until someone good thoroughly figures him out. We have, after all, found LCS-level play of Karma, who was decried as both bland and useless by the majority of the playerbase, post-rework. It does allow for decent disengage, however. The ideal-scenario damage for it is ridiculously high. Chasing a Lucien directly while he channels is a good way to die.