though I'm not to sure how he stands when he's behind.
He's pretty good, he can go full tank and still have a fair impact. The problem with Wukong, as far as I'm aware is that his lane is basically irredeemable. He can't even farm against meta champs like Rumble and Gnar, they can bully him all the way off the wave. If you look at any meta over the last few years this has also been true.
This is why when Wukong has been viable he's been so as a jungler moreso than a top lanner. Jungling allows him to circumvent his weaker than average lane. Even then he needs the right meta, I believe that the meta where Wuk was a viable jungler was something like Kha'zix, Vi and Lee Sin but you could only actually pick Wuk if you banned Lee Sin, which was quite common at the time anyway.