Okay, I have only played CB 4 times (2 consecutive days back in 1997). It was my absolute favorite of the 15 courses I played on a two week trip.
So I am certainly not an expert but regarding the new #9:
As was mentioned the walk from 8 green to 9 tee is already long and now it will be longer? "the extra 50 yards must be worth it" - really?
It is hard to tell from the drawing in the Mackenzie & Ebert proposal, but it looks like the tee shot is a forced carry to a fairway with a steep fall off to the left. It says "bank", isn't this a steep hillside?
Long uphill walk, forced carry, hazard left - recipe for frustrated golfers and slow play.
One thing I like about the current #9 is the total change of pace. You are deep in the dunes for the 6 previous holes and then you walk up the hill, get to the tee, see the castle in the distance, and have a wide open fairway in front of you - time to let the big dog eat! Yes, the hole needs work - blind tee shot and the green has extremely poor definition. This has likely already been considered, but could the existing fairway be leveled and a new slightly raised green be built?
The new #10:
Okay, I have a soft spot in my golfers heart for the #10 tee box. I had the course all to myself on a very nice late September afternoon. After enjoying the view of the bay and the golf course below me, I hit a nice solid 3 wood and watched as a small flock of seagulls flew underneath the golf ball.
The new #10 tee boxes won't have the same view or exposure.
Also the new tee boxes introduce another forced carry (across the ditch) and also brings into play the gunk to the right of the ditch. At least if you slice from the current tees it is a lateral hazard, not so from the new tees. More frustrated golfers and slower play.
Outside of the drainage ditch on 10, 11, and 13 are there any forced carries at CB? The penal nature of the proposed new tee shots on 9&10 just seem out of character.
Just my .02 worth.