Gripes of the movie?
-Jokes came fast but are a bit hard to follow (may not know their references). They say them really fast and then move onto the next one so it's not so easy to remember the lot of them.
-However epic DvW battles were, they somewhat become stale since there is no stake at them just stabbing each other constantly. You know they regen so when it gets prolonged, it becomes dull and repetitive.
-Wolverine finally donning the full suit near the end but the mask didn't look all too aligned with the mouth, crooked and a bit off. I think it would've been better off if they made it like a Batman type of armor that's more molded to the head. Grateful they kept the white part of the eyes though.
(ie: https://youtu.be/2sPvTM7Ry7Y?t=73)
-Some parts the CGI just looked bad. The one I can currently recall for the time being was when Wolverine jumped out of the bus window in the back with Deadpool but he looked waxy and warped a bit.
Other than that, while the plot was basic, it brought a whole lot of nostalgia, cameos, and all out fun.