Voodoo, I respect your points, and they are all solid sound arguments.. writing and good direction is super important I agree but...
If every predator we see in film, is the same, in terms of codes etc, you're not leaving yourself much room to work with in terms of keeping things original and fresh, and more importantly keeping the audience involved. Predator is not just one character, it's a species. So why wouldn't they each have unique personalities?
Personally I like the idea that each predator has its own distinct character profile, and does things slightly different from the last. It keeps things entertaining, and new. I think strictly staying by the coded formula, really narrows your options down in terms of doing things that haven't already been done. And I really want more than that in the next film.
I agree with a back to basics approach, I just think theres plenty of the room to get creative with the star man himself.
If it's just going to be a rinse and repeat of the originals formula, that just isn't clever story telling imho.