Well he also struck out 19% last season compared to 13% the 2 years before so maybe he traded some contact for more power, but his 82 wRC+ is the same as it was in prior seasons so I wouldn't bet on those 4 months meaning anything for projecting his future. At 29 years old his defense is likely to decline if anything so he could even be a worse player, who knows.
Cavan Biggio had a 126 wRC+ in the second half last season, do I think he's primed for a breakout? No.