To summarize:

General

• Too many penalties.
• First team is meeting expectations, but second team needs to improve.

Quarterbacks

• David Cornwell was limited with a foot injury.
• Bateman, Barnett, and Hurts got equal reps with both teams.
• No major mistakes, but Saban would like to see better efficiency.

Freshmen

• Jonah Williams is doing a very good job.
• B.J. Emmons is "instinctive" but still has work to do.
• Trevon Diggs is working primarily at safety.

Injuries

• "Bo looked good early, got a little dinged so he didn’t practice as much or have as many carries."
• Dalvin Tomlinson injured his ankle.
• Robert Foster was limited at pre-scrimmage practice with a shoulder harness on the same shoulder than he injured at Ole Miss.
• Da'Shawn Hand had to stay out of the scrimmage due to an unspecified injury.

Sources:

• http://www.al.com/alabamafootball/index.ssf/2016/08/live_updates_nick_saban_review_4.html
• http://www.al.com/alabamafootball/index.ssf/2016/08/alabama_practice_report_some_p.html
• https://www.seccountry.com/alabama/live-updates-nick-saban-speaks-after-alabamas-first-scrimmage-of-fall-camp
• http://alabama.247sports.com/Bolt/Saban-updates-injuries-after-first-fall-scrimmage-46749534