It would be nice to have that option, but I still think the Star would play a lot. You have to ask first why the other team is going with a "spread" formation. For example, we do it to remove players from the box for the running game. Oregon traditionally has done it for the same reason, as has Rich Rod. Texas A&M, however, does it for the sake of the passing game, as have teams like Mike Leach's Texas Tech teams.
If a team is trying to spread us out to run the ball, one response might be to leave the traditional LBs on the field (if you believe your LBs can run sideline to sideline vs a spread look), and move a hybrid LB/S guy (like Lee) out to the Star, which would theoretically give you the best run personnel out on the field.
In passing situations or against a Texas A&M type team who is spreading you to throw, you might leave a guy like Lee as a LB and bring in more of a true DB type to play the Star, theoretically giving you the best coverage unit. So I still think we'd see that 5th DB quite a bit, even if Lee continues to improve. In fact, it might even depend more on how well the other two LB spots perform. We want our best 11 out there on the field to do the task at hand.