Great depth AND youth. Plus a number of players that can passably play multiple positions.
AS SupremeCommander suggested, the key is the starting lineup. We've upgraded at 2 positions in terms of talent and versatility. Silver medalist Fournier is basically the French Jordan - "Air France". That guy is basically the best French wing in the NBA... since... ever. He brings much more to the table overall than Bullock. And Kemba obviously bring more to the table than the version of Elfrid we saw last year with the Knicks.
Not only that, we also expect our young players RJ/Quickley/Obi to continue to improve. Knox to a lesser extent.
I think the most relied upon folks on the bench unit will be Rose/Quickley/Burks/Noel/Obi, and I feel pretty good about all of them filling in as starters in the event of injury. Burks/Quickley will be particularly important since they are capable of playing multiple positions. We can handle missed games by 2 players and still operate within this group of 10 (+Taj would definitely be involved if Mitch can't go) without diving deeper into the bench.
If Kemba/Rose both miss games, I'd imagine Thibs would probably go with Quickley/Burks at PG and reduce his rotation to 8, perhaps with a handful of mins dripping down to the next guys.