Yes it's possible, I mean now that we can hand pick the off season free agent bats that are performing of course it would have improved the offense (but not fixed it), but remember many people wanted them to get a guy like Soler too who has not performed, which is why no one is using him as an example for improvement right now, and a month ago nobody was complaining about the Turner signing either.
And yeah, the offense is probably better and maybe we win that game last night, but maybe we lose a game earlier in the season because IKF isn't here to make a key play at 3rd or maybe Teo boots a play in LF because Varsho isn't out there because he's in CF instead of KK?
This is why I used fWAR as my example earlier when comparing IKF/Turner/Vogelbach/KK vs. Teo/JDM and let's not forget I'm using hindsight to hand pick Teo and JDM here as successful examples of off season free agent bats when it could have just as easily been one that has fallen flat.