When Togashi has the ability, he's a brilliant artist.
Nobody can do atmosphere like him, and his style is so versatile that he can change art style based off the vibe of the panel and still have it feel cohesive. His panel work is brilliant as well when he doesn't over indulge in text walls.
But seriously, can you really tell me that the standoff between Gon and Pitou during the Komugi hostage situation had poor art? Or much of the Netero vs Meruem fight?
Also, only hiring experienced writers or artists takes away newbie authors ability to grow. Jump has always been a place for newbies and it always should be. Only using stale veterans is Sunday and Magazines niche lol.
Also hiring experienced writers doesn't always work out; see Stealth Symphony (no matter what Sharkbait says it was not intended to be a short series, it was cancelled)