I believe Mazza and Springs were likely to be DFA'd that offseason, which is why they did a "two-fer." At the time, they needed catching depth and they really wanted to clear out some of that pitching dead weight. I liked Mazza in 2020 and they really talked up Springs on the NESN telecasts. Sox really liked Springs k rates and spin rates. I was kind of surprised they let him go. We can now see that Ronaldo really doesn't seem to be a long term fit a catcher. His upside at DH or other positions is moderate. He probably gets a longer look next year as the primary catcher in WOO, but I don't see it.
They should have kept Mazza and Springs instead of Austin Brice and Colten Brewer. Ronaldo has potential, but he's sat on the 40 man for 2 years now and hasn't provided anything to the big club. It's going to take another year in WOO to even determine if he'll ever be ready.