I have mixed opinions, in some cases it does seem that they are blatently ripping off IPs, in other cases I think that the material is generic enough for there to be no major problem.
With "Uncharted" the whole thing is extremely derivitive to begin with, it's a good game series, but the "wisecracking treasure hunter" thing is hardly new material and has been fodder for games for a long period of time before "Uncharted" and "Tomb Raider" made it big. I don't think you can defend either of those IPs on any kind of creative grounds.
With "Order and Chaos" I think it's actually clever in a kind of warped way, given that Warcraft was based on Warhammer, the story I've heard being that originally Warcraft was developed to be sold to Games Workshop (as the RTS games), but was rejected in such a way that included tacit approval to develop the project in that style if they wanted to release it themselves or find another publisher. I thus find it kind of interesting to see Games Workshop getting comparitively clobbered with most of it's computer releases. Games Workshop itself was seriously inspired by the writings of this guy called "Michael Moorcock", whose entire "Champion Eternal" cycle (or rather his entire body of work, which is now linked through that) was the rather obvious inspiration (and acknowleged more than once I believe). The whole style of the way things things look was taken verbatim from his book, compare say how he describes Champions Of Chaos to those from Warhammer for example.
At any rate with Warhammer Online replacing Chaos with "destruction" I kind of find it amusing to see the biggest knock off being the ones who are naming the material most correctly after the root material.
I'll also say that this has been out there long enough, and Moorcock and his "style" has inspired so many things, that much like the treasure hunter thing above, I really can't bring myself to claim "foul" on that one too much. To do that with a straight face, you'd have to go after everyone who has been inspired by Michael Moorcock, and even if many argue his writing hasn't always aged well, the dude is one of the Grandmasters of fantasy for a reason, he's inspired so much stuff it's crazy.