I was expecting an action movie too. It still doesn't change the fact that the story sucked, there was almost no real action, there was no challenge, almost nothing happened all movie, and the movie ended on a really huge cliffhanger. There's been plenty of action movies with good scripts this summer. This one is just awful.
About the reboot. At the end of the last movie the extent of her mental powers were only making someone bleed to death. They could have just ignored it or or said it took lots of efforts. That and they could just have said it doesn't work against zombies. It only became overpowered in this movie because they made it so before the reboot. For her physical abilities, well... she still kick zombie ass like it's nothing and she still take blows that would kill someone else. She's still superhuman.
Yes, she took a knife wound. It was the kind of serious wound that would disable the limb in question, would bleed a lot and would be extremely painful. And yet she just put a bandage on it and kept using that limb without any pain or loss of strength.
The only challenge in the movie is when she get knocked out by a blow that would crush someone else. But then her friend just comes in and keep the monster's attention the 30 seconds necessary for her to wake up and kick the big guy's ass. And then she just wander off without any lingering pain.
As for the last boss fight. Yeah she couldn't just kick it's ass without efforts. It took 3 of them to kick his ass without efforts. Considering his abilities and what he can do, they got away really easily. None of them even got wounded.
And let's not even get started on how terminally stupid all of them were. This is a little spoiler-ish but when they were at the scene with the big one smashing the gate, why did they stop shooting at it after two pistol shoots when letting it break the gate almost certainly meant death? One of them nearby had a shotgun!
Same with the last boss. They made a scene of unloading their pistols at his body. And yet none of them shot his head. Come on!
It's a stupid movie with nothing happening, no suspense, no challenge, and no ending.
