I thought it looked alright, i mean wasn't gears a bit space marine bulk characters, this seemed a more realistic game, which should be better.
As for it being a bit lack lustre, if it's coming out holiday 2016, thats a very *long* time in development terms, and many games wouldn't even be working correctly at this point in time in their development, so I think people should be positive that they have a working game which seems to be running good. It can only improve from here. I would also expect a much bigger jump in quality by the time the next E3 comes along.
Though if it's still all corridor based, then I think people will be more negative about it, after seeing uncharted and it's crazy car level, people I think are expecting more than just the same with different graphics/story.