Levine is indeed a roster lock, and a lock for activity on game day if healthy. His usage/play on Thursday was the single most interesting aspect of the game to me, because it represents a significant schematic shift for Pees.
The Ravens played just 62 dime snaps the last 3 seasons (41, 8, 13, 2% of total snaps). On Thursday, after Levine practiced with the LBs this camp, he played 18 snaps as the dime, all in obvious passing situations. He made 3 good plays among those 18, the PD/near pick, the drive-ending tackle on Wegher (Q4, 12:57) in the open field, and negotiation of the screen traffic (Q3, 4:30) where he arrived on time, but the WR had been tripped up by Elam. He showed AA blitz with Brown several times and will provide more options on 3rd down in terms of coverage than a linebacker. I expect him to play well in the role and join a fine line of quality dimes the Ravens have had (Ralph Staten, Corey Harris, Chad Williams, Jerome Sapp, and Haruki Nakamura). Those guys may be lesser known, but they all made some big plays and were on the field for the highest leverage downs, so their contribution was magnified.
I wrote a piece on the dime recently here that compares Pees-era dime usage to the 2000 Ravens defense:
http://russellstreetreport.com/2016/07/29/camp-notes/ravens-defensive-backs-dime-defense/
If you're interested, here are my grades by player from Thursday's game (long):
http://russellstreetreport.com/2016/08/12/filmstudy/2016-draft-class-preseason-opener/