Its really weird that they have this offer. Like I'm sure there are a few outliers who might make full use of it but most gears fans most likely have all three games already. Still, cool I guess they are doing it at all.
I think that most of the people with negative things to say come into the game wanting to hate it. If you come in with that attitude its easy to get cynical about it. If you wanted to get picky you could tea the original games apart in much the same way. Did the original games have almost no story? Check. Did they all reuse content ad-nausem? Check. Could the fixed camera angles be a burden in combat? Check. See where Im going with this? If you choose to focus on just the negative that is going to be what stands out to you.