I for one believe that both JR and Sky Walker can be significant contributors to the C's this coming season. Based on the limited time we saw the two and their experiences in the D-League, we all know the two have incredible athleticism and can really play ball.
The issue last year was their understanding of Doc's system, and in particular, Thibodeau's defense. Under T's system, if one guy misses an assignment or doesn't keep his man in front of him when he needs to, the other team is either shooting lay-ups or free throws. Both of them had trouble understanding the right reads and rotations. If you go back to the year prior, this was the main reason why Doc couldn't trust Pruitt - he'd constantly let his man beat him off the dribble.
Now with a year's experience under their belt, I really hope that both Giddens and Walker have grasped what the C's are trying to do and can earn some meaningful playing time. They could be significant contributors this coming year in giving Pierce and Allen some much needed rest!