There is a point behind the quote "If it's not broken, don't fix it". The old resource search was much more accessible and overall better experience to find what you need. Sure, I really love the new style and everything it brought to the community and website in general, however some of the things are kind of weird. For example, I'll have to go ahead and agree with what Marshmalo said about the resource merge and hiding.
Hive is the main site for Warcraft 3 stuff, coming from the simple edits to fit community needs made by friendly and helpful makers, all the way over to the best models made for Warcraft 3 by community in the world. However, with this update all that seems to be somewhat "behind the scenes", to put it like that, with the merge on top of the page and them all being under one button.
As for the search function, and in response to what Ralle said, back in the days people who needed models would go into the models section and search for their models. If they'd love to search for icons, they'd just switch to the icons tab and do the same thing. It was kind of straight forward to what you need. Straight to the point. And by expanding that and giving the whole forum when searching, it just makes the thing more messy in my honest opinion.
Above are just my two cents regarding the update and the way things function at the moment, so please don't take hard feelings or think of it as a disrespectful way of flaming and provoking the developers. They did an amazing job and I really love the new layout, as I said above, however there are some things which I don't personally find to my liking.