It's pretty obvious Lebby's plan was/is to use the portal rather than develop. Essentially, we're trying to be Ole Miss.
I agree with this to some degree, but maybe not in the way that you are exactly meaning.
I think his plan is to have a high powered, exciting offense for sustained years, similar to what was done early in the Kiffin era. By proxy the defense will improve because good players want to play for exciting teams. I think he believes that if he can produce a consistent and exciting offense, then the rest will take care of itself. UM has gradually improved their defense each year that Kiffin has been there, but in the beginning was not a high priority for Kiffin.
I dont necessarily disagree with this plan, however the one thing that UM does better than us (and likely will continue to do so) is hyping the program.