There is basically only ONE thing to legitimately complain about on the position player side and it's that the defense is not great.
Bo - has played a competent but below average SS
Biggio - has played a competent but below average 3B
Grichuk - is maybe playing a bit over his head in CF, expect regression
Teoscar - is playing fine but probably regresses to a below average RF
Gurriel - boneheaded fielder with a cannon
Catcher - losing Jansen hurts on defense, all things considered
Panik - providing mediocre bench D
No nightmares but lots of room for improvements.
Springer coming back should be a decent boost. They could upgrade CF and LF or RF on most nights, if Grichuk moves to a corner.
I wonder if bringing up some young/athleticism at some point (thinking Smith, Moreno, Lopez) could be a good cascade. Less reliance on the aging Panik in the field, competition for Biggio at the corner.