I've downgraded my reliance upon defense recently. Give me a good defensive CF and Catcher... make sure my 3B, SS and 2B have okay gloves... and not too many of my guys have D- anything, and I'm happy.
OTOH, often it's the little things that win games... + plays don't hurt in that regard.
I'm currently trying a team that exploits what were reported as the new fielding parameters... good glove deadball guys and modern pitchers, and so far I'm happy with my results. I'm leading in most fielding categories... not sure if I'm forcing other teams to make more errors, though.