I noticed some Marlins fans noting that Floro has a tendency to melt down in close games this year, so I did a little bit of digging:
High Leverage - giving up .864 OPS in 75 PAs
Medium and low leverage - giving up .692 OPS in 96 PAs
When within 3 runs - .833 OPS, within 2 runs .853 OPS, within 1 .921 OPS, tie game 1.005 OPS
When > 4 runs: .604 OPS
So he's basically pitching like Pagan is, a solid middle reliever with a strong FIP suggesting he can be better, but can't handle high pressure situations.
IMO this trade itself isn't an awful move, the awful part is that this front office turned Cade Povich, Yennier Cano, and 2 lottery tickets into two months of Dylan Floro. Not to mention failing to get Lopez right and receiving a net negative WAR from him. I would bet Floro pitches better than Lopez does the rest of the year so it could turn into a minor win amidst a very bad trade.