In fact, for the first 3/4 of the film it is actually pretty engaging. It takes the tired premise of "you must relive the same day over and over until you get it right" premise and adds some new twists, some humor and keeps the action moving along. It handles the necessary repetition well. In the first hour or so of the film they never really give you a chance to think. This isn't a film where thinking helps. That sounds damning but it isn'; good action films take you out or reality and turn off your brain for the ride. That is a compliment for an action film and Edge of tomorrow manages it, for awhile.
There is a point in the film where something changes in Cruise's character (being vague here to avoid spoilers) and the film slows after that. It even seems a little slapdash. The denouement is also about as Hollywood as you can get. It might be best to leave ten minutes before the film ends. But anyone who walks into this film expecting a "non-Hollywood" ending probably doesn't go to the movies often and, therefore, won't notice. It mostly works and for big budget sci-fi that is a rarity.
Most of the actors in the film, however, handle it all professionally. No one wows you. No one is really given a chance--not even co-star, Emily Blunt. Blunt is fine but there doesn't seem to be much chemistry here. Who is responsible for missing chemistry? Actors? Directors? Casting? It could be all of the above and others as well but who is responsible doesn't much matter to an audience.
One of the problems Cruise faces as an actor is that he isn't versatile. Lots of decent actors are not versatile but when they become big stars? You see THEM and not their character. It isn't their fault necessarily. Some actors who have never been accused of being fine thespians have overcome this (Clint Eastwood springs to mind). Other, better actors, have lazily fallen into this trap (Johnny Depp springs to mind). Cruise can't really help it. He has a limited range and he is a big star. You see "Tom Cruise" on the screen and it is a tough thing for him to overcome.
And while this is true here? Cruise manages better than usual. He CAN do it--War of the Worlds showed he could be a sort of frightened "everyman." Maybe it isn't all on the actor but on his directors? I have often wondered if Cruise is better with directors who are "bigger" than him in Hollywood.
But psychoanalyzing Cruise for the purpose of damning or praising him isn't terribly productive. Maybe he and his agent just pick weak scripts. Which is why a film like Edge of Tomorrow may scare off audiences. They remember Oblivion and other failures (and even some near misses) and just don't head out to the theater.
Here he has managed a decent performance in a decent, if not terribly memorable film. If his co-stars had more opportunities it might have improved the movie but it is worth a look if your expectations are not too high.