This same bullpen will have a month or two of being one of the top 5 bullpens in baseball. They had hot streaks last year. You need a mix of not getting overused or underused. Early in the season, starters are still getting stretched out. I'm not saying that they shouldn't or won't make some moves at the deadline, because frankly, they will need to make some moves because of the abundance of talent they won't be able to protect next offseason, but some of these guys that have been bad will be better with more reps.
I'm not concerned about the bullpen at all. I have grown a bit tired of the 9th inning follies, but it will correct itself in due time.