I'd file this under the "no shit" category of advice.
But as said above, yeah we dont have a lot of pieces for Trubisky to work with, and that is concerning in the event that we HAVE to play him. Just look at what happened last year, we had enough injuries going around that we were on our third QB and down several WRs, TEs and OLmen. If we are forced to play Trubisky in that sort of situation, I would be very worried about his development.
But hey, maybe the WR group comes together and proves to be a competent unit, and the rest of the offense stays healthy. That's be a great situation to put in our rookie.