Other mistake: During their first confrontation with Cassandra Nova, the dynamic duo seem to score a point when Wolverine backstabs her in a very literal sense. While it makes for a cool moment, it also is pure nonsense; they are in an open space surrounded by her goons and none of them has the slightest reaction nor you can see any cover Wolverine could have used to sneak upon her. Even the soft ground is intact.
Suggested correction: Cassandra uses her powers to phase shift (ghosting, selective intangibility) Wolverine into the ground and behind her. After her quite long time inside Deadpool's head, Wolverine manages to get himself out, phasing himself back behind her and stabs her. Since he was phasing, the ground won't be disturbed.
But he DOES disturb the ground when she phases him into it. He sinks in a hole, he leaves a trail. And that is with her controlling the process. Since he doesn't control the phasing and how to emerge from it, I don't get how he can just casually pop up (with no particular speed) without any trace, and again, unseen surrounded by goons watching from every angle, to nobody's reaction.
Look at the scene closely (if you can). There is far less disturbance than would have happened if someone was dragged through the ground. The only disturbance you see is from his claws still sticking out of the ground as he is being dragged; his body has zero effect on the ground. I think it also has to do with the amount of force Cassandra uses to pull him. Coming up slowly would hardly disturb it. The goons won't interfere; they know what she is capable of and has nothing to fear from these two.
Will of course check out the Disney+ release in the future, but the movie doesn't show the action going on this way; if they wanted to show him being phased, then they shouldn't have depicted him as being sucked into the ground with his body looking very much solid, nor his claws leaving claw-shaped trails. The fact that it causes much less of a disturbance than it could have is because well, her powers are not something we have a real life comparison with; the way she "skinned" Johnny wasn't physically accurate either but there's no lack of consistency with anything else. As for the on-screen portrayal of the ground pull, all I am pointing out is that he very much leaves physical and permanent trails on the ground that the movie shows, at no point his body shows to be immaterial, and then a minute later he just pops up, with no particular haste, and there are no traces of him going through the same medium. As for the lack of reaction, it's a lack of timely reaction; they do react to him when he stabs her, you can see some of them raising their guns, so it's not as if all of them have such trust in their boss' abilities that they are nonchalant about whatever is directed at her. It's just that they react to it when the audience does. There's no reason why they wouldn't do it earlier. Other than the fact that it's a movie, but's not like Deadpool makes a joke about their terrible reaction times.
Other mistake: In the first scene, they skid around a corner; there are many other skid marks on the same corner. I imagine the drivers had to repeat the recording several times.
Other mistake: When Abbott is talking to Axel for the first time, he is flipping through a book that has files and pictures on Axel. One of them is a picture from when he got arrested after he got thrown out of the window. It is made to look like it was a picture taken of him at the time of his arrest, but it is a direct screen grab from Beverly Hills Cop.
Other mistake: When Commander Krom meets with Larry at the bar, there is a visible can of Axe body spray on the counter between them.