its not very entertaining viewing though, stop, start, error, scrum, error, penalty, error, scrum ......... the Castleford tigers are much better to watch so far this year for entertainment value.
They were great to watch many times last year too, but the "boring" (read: high percentage play) sides like Wigan and St Helens win. And it is the same in the NRL.
Good luck to Castleford, but I doubt they would win a single game in the NRL.
Teams have off games, and the tackling intensity starts high in the NRL and the rest catches up. By the finals last year, most teams had great handling (obviously the Cowboys were terrible against the Sharks and paid the price).
Good handling doesn't always mean good attack (look at the Bulldogs), but intensity in defense (which causes poor handling in opposition teams) is one of the best signs a team is in form and going to be successful.
I'm happy with 2017 so far, there are errors, but they will clear up. But lots of teams have started tackling hard, which is a good sign for the competition.