Ben 10 and all its spin off series have had their ups and downs, from simple Saturday morning cartoon to darker and more serious action cartoon and now a more comedy and action balanced show. All fans have different opinions of which was the best and I am no different, but Ben 10 Omniverse isn't as bad as it may seem. Omniverse trades out the Saturday morning cartoon "monster of the week" for multiple episode arcs. The monster of the week part is still there, but bigger villains usually take a little long to beat. Because of this, a lot of story elements take longer to resolve, which isn't a bad thing, and give more to enjoy in character interactions. It may have a slow start, but as it goes on and new characters and villains are added, it only makes the show better and better.
If you enjoy multiple episode arcs and a better balance of comedy and action, I highly recommend Omniverse, and if not their are plenty of different Ben 10 out their to enjoy.