Gregorius batted ball statistics took a turn for the worse in 2020. He posted a career worst average exit velocity, placing him in the lower 2 percentile range in all of MLB, and produced the lowest maximum exit velocity of his career since they started measuring it. He had a rough 2019 season, only producing an 83 WRC+. In many ways his batted ball numbers in 2020 were worse than 2019, with less hard contact and more weak contact. His xWOBA in 2019 was .297 vs actual of .298, whereas in 2020 his xWOBA was .298, but his actual was .342. His poor 2019 numbers, combined with the weak batted ball profile suggests there's a good possibility that his more favorable 2020 results are just as likely to be replaced with his bad 2019 results. He's outperformed his expected statistics in the past, and he's never been a Statcast darling to say the least, but much of his success seems to be based on continuing to squeak enough balls over the fence for homeruns in order to see some success at the plate. If the power slips in the slightest you are left with an expensive slap hitting backup infielder. With the lower max EV and average EV it's possible that's already started to happen.
Gregorius would fit just fine on this team, my original point was that I don't find that he's an exciting potential pickup compared to other players that are available, basically anybody that can even provide above replacement value at third base is an improvement on what they've received the last two seasons. I would like to see the front office aim higher, if there are better quality players available that fit within the budget I'd prefer they exhaust those avenues first. The club is at the point where each added win to the roster becomes very meaningful.