Share 'Di2 "Overkill" for cross?'

After deciding to hang-up the road bike after a nasty accident while riding involving an SUV, I've decided to get a cross bike and more or less limit my riding to mixed trails. Cross racing is also a possibility in the future. My road bike frameset was destroyed in the crash, but the Shimano Di2 (electronic) groupset came through mostly unscathed. My question is whether or not Di2 is overkill for…