Yeah, we discussed Pro Skater 5 a bit on the previous page.
As Arcadia says, patches being bigger than the game isn't really that unusual these days. For MMO style games, this is very common of course. Conan Exiles is 30GB from disc, but now up to 90GB with patches. Final Fantasy 15 of course is also much, much bigger now with patches.
One of the "issues" with having the "full game" on disc this generation, is that a lot of games are actually bigger than the max capacity of a PS4 Blu ray disc after updates. Square-Enix didn't even try with the Royal Edition of FFXV; it's the vanilla release disc, without even the day one patch, and the rest just gets added with downloads. In all fairness, they couldn't have fit all the content on a single disc anyway, and everybody seems convinced that expecting a two-disc bluray release is absurd... I don't follow the logic of why that is, though. If publishers can afford statues/helmets to include with "special editions" of games, then I think they can shell out the extra money for one extra disc of content.
THPS5 didn't have that excuse, though. I believe the base game was 9GB or something on disc. What some people don't realize, though, is how large some of the texture files need to be for games these days, to satisfy the "4k generation." It's not hard to quickly take up space with all that super hi-res stuff. An entire Gamecube game used to fit on two 1.4GB mini-DVDs at the most... but those were very different times, and textures were much smaller in games that only had to look good at a 480i/480p resolution.