Watched NB3 kill Gromp+Blue at same time, since Gromp is ranged, you can position to hit both. Can't do it at level 1 probably, but still makes clear faster later on.
Actually, watching NB3 for ~20mins still made me think this champ is going to be a bit weak. I wanted to see him blow shit up, which he was able to do when landing Q, but looked so helpless otherwise. And this was on PBE where teams and players are very lackluster.
Quick thoughts on abilities:
Passive is really good. Permanent free damage. Very powerful and is the most interactive part of the whole kit.
Q doesn't seem easy to land at all, but is the most interesting mechanic. Unlimited range and making it grow are neat.
W amplifies his passive a bit, but otherwise boring. You can use it to make your passive hit the enemy a bit more reliably, which is fine, I guess.
E is on a ~45sec cooldown and is rather useless for fights, it's just used to travel places and is canceled if you're hit. Fine for the map pressure, but boring.
R is a big damage ability with great range, really boring though.
Outside of Passive+Q, the champ is just boring and a bit weak.