Will add my two pennies ...
Carr looks good right now. More comfortable and is dealing well for the most part with the pass rush he is already receiving. As previously noted, they seem to be incorporating a lot of designed playactions and rollouts to take advantage of Carr's mobility and protect against the sack. Numerous flashbacks of Jake Plummer with more speed and a better arm IMO. I saw a handful of plays in which Carr either (a) went with the dump off, which was completed and is fine, or (b) went to the run, but in both cases where I would have liked to see him try to buy more time and get a longer, open route for additional yardage. He looks improved though and for the most part appears to be responding well to the pressure and expectations. He has thrown a handful of beautiful deep routes that were dead on and as Coach mentioned, the slant to AJ is just sick. I haven't seen Moulds practice much and am anxious to see how they develop a chemistry. FWIW I have watched Moulds take Andre aside many times and they seem to be hanging on the sidelines; exciting stuff.
Rosenfels looks good but is clearly of reserve caliber. Not a very strong arm but he seems to make good decisions. His deep ball is really weak but inside of 15 yards he is pretty money.
Porter, IIRC, is ahead of Pickett in terms of depth chart and hasn't shown a lot either way, but he looked okay in a lot of the passing drills.
Pickett has received extremely limited reps in the major team drills and appears likely to be practice team fodder.
Again, I am noticing a general trend of (a) a lot of mixed routes; short, long, out and in, and a lot of plays incorporating a safety valve, and (b) 3+ eligible receivers on a lot of plays. A few screens and a lot of backfield routes. A lot of misdirection plays on the run. Makes you downright giddy, and cannot help but imagine how this will look on the field against Philly. No more run-run-pass, no more playing not to lose; that's for sure.
McKinzie in my limited observation has looked good; sticks to his man really well, but inevitably gives up catches to taller receivers. Hopefully he will succeed in becoming more physical, as his size almost inherently limits him to nickel and dime packages. Unfortunately I haven't seen much of Walker one way or the other; just haven't looked for him, and on Sunday I was usually watching the offense or line drills.