Agree N6. Lee is a newby who is being asked to do more than he is ready for (or may ever be ready for) due to injury and/or outright insufficiency at the position. However, because Lee can't currently do X doesn't mean there isn't a role for him if he does Y fair to good. And Lee has shown some ability to do Y fair to good.
Getting KVN back, Lee, obtaining Harrison (and if what we saw yesterday is what we can expect), hell even Roberts & Flowers when used right, what this hopefully gives us over the next 3 wins is substantially more flexibility and productive D packages (and save Chung's "LB" snaps for much much more specific scenarios). General run D, short yardage, quick drop into zone, blitz packages and pick up the backfield receiver -- having a good answer/package for these scenarios is what we can hope for (most critical, KVN, an actual 3 down LB who can make that short-mid middle less productive for opposing O's. Even the sorry Jets O had some success there during one part of the game).
IMHO the D needs to be at its best for these next 3 games. The good news is I think the D will be at its peak starting a week from Saturday. Look, no doubt the O is quite good but -- again IMHO -- this year's O cannot be expected to carry an extra share of the load. This year the SB victory will need to be distinctly complimentary (even one where the D wins the game for us). Again I think this D may finally have enough pieces for the chess master to adjust packages and hit peak productivity.