He got a pick and subsequently some bans by and against G2 in Worlds. He's pretty vulnerable early in the jungle, which I suspect is a reason a lot of people stay away from him.
Re-watched most of that game. He actually had pretty good presence. Helped get first blood. Got 3 buffs on second jungle clear so both his top and mid got red. Will be curious to see if he gets more play if bot laners try to punish the greedy gold generation starts.
Think he's good if you're mastering him in solo queue, too. Probably isn't someone who you can flex into. So if you don't have a lot of games on him you probably wouldn't pick him just because a team needed Ardent.