Ok I get that ADI recycled suits from Resurrection for its 2 AVP movies. I'm not a fan of Resurrection and wish it wasn't made either.
But from an objective stance the suits looked fantastic in all those films, at least when demonstrated in isolation on ADI's youtube channel or DVD extras during making of segments.
I'd second that the PREDATOR suits in AVP were "sometimes" dodgy looking, despite more animatronics used for facial expressions. Their seemingly being unable to close their mandibles, colour scheme for their skin tone people "liken to a cheap halloween mask".
I'd have to watch PREDATORS and AVP back to back again, but you're right that PREDATORS does have some good suit work. "The crucified predator" was one of few wow moments in the 2010 film.
Overall though, suits do not maketh a good movie. PREDATORS has moments that are Uwe Boll tier.