I just see 4 guys who you prefer as setup men
It's totally fine, and there is no need to upgrade. Also, Nance, Little, Fluharty, and Fisher can reasonably be second tier setup men as well, say 7th inning guys. So you could have a full 8 man bullpen without any slop at all. It's great for depth. Not to mention the rule 5 guy, and Bastardo, and Tiedemann, and the excess SP...