The team needs a closer caliber arm, full stop. Leiter and Neris are getting it done, the latter through gumption and platoon splits, but it's clearly a tightrope act and they'reclearly a guy short in the circle of trust. Another guy you can give 9th inning duties to, ideally one that you can do so regardless of situation, will have a cascading effect and honestly do most of the bullpen fixing in one move. Tanner Scott still feels like the guy, he was awful to open the season but he's been himself since April 20th. Go get him ASAP, do it yesterday.
As for what else the pen needs, I think that's more wait and see. I am not expecting Merryweather, Almonte, and Alzolay to come save the day, but odds are probably that one of the three slides back into the pen next month and resumes contributing at a high level. I also feel good about the kids. Hodge has surprisingly been incredible in the early going, and both Palencia and Little feel *really* close to figuring it out. You've also got other live arms at Iowa like Arias, McWilliams, and Roberts. If the deadline was today you probably need to add some unexciting depth types, but I'm hopeful a month from now that's no longer going to be a need.