Everything I know about Chicago GC and my handful of rounds there, nothing would indicate them wanting to change their course or add any more tees. Realistically they could add farther back tees to 3,5,6,7,9,12, and 13 without having goofy teeshots over the previous greens. Just on par 4's that would leave 5,6,8,9,14,15, and 18 as wedge approaches for the pros. Both par 5's are very short for the men's game at 536 and 525 with no room to really lengthen, though I could see 4 playing tough even for the pros with that perched green.
I was out on the grounds at Brookline last week and the amount of infrastructure is immense, I'm struggling to see that at Chicago as a few other posters mentioned.
Don't get me wrong, I'd love to see the pros play Chicago, maybe there's something you know that I don't!