In a lot of ways the team is as good or bad as its young players. Assuming they add a SS, if Kingery and Haseley can improve and Hoskins can maintain his health/2020 level of production, that's a really good line-up, and you can just tinker with the bench or upgrade at the deadline.
Similarly, the rotation really turns on Howard, not whatever extra veteran part they sign. But that can also be addressed at deadline.
I think both Kingery and the bullpen were so freakishly bad that the team is going to get a couple of wins even if Kingery still isn't great, or the bullpen is merely below average.