The homages didn't quite 'ruin' the movie for me, I mean I really enjoyed all of the new stuff and the creative efforts as much as everybody else, but in a movie that I'm sitting on the fence about, throw in TOO MANY homages (especially after a movie like AvP:R) and they will shove the movie from A-B grade to a C-D grade.
It seemed like a great movie with awesome performances, so why the homages? Homages are the weakest sort of plot device you can use to appeal to fans, it just makes you seem desperate or that you, being the director or producer or whatever, are a fanboy yourself, more concerned with throwing in every reference you can to the other films to ensure loyalty then in having confidence in your own creative new work.
They are always cheesy, if you use more than one or so a movie. Terminator 2, 1 homage, also done well and steeped in emotion. Terminator: Salvation? More than one, and they made people cringe. That's my comparison, and I just think a movie like Predators should have more self-respect than to use so many homages.