Spoilers if you've not seen recent filming....

They should bring Izzy back as someone who is the antithisist of education at Seattle Murder Deatrh.

Hear me out; they bring Izzy in as an oncologist on Catherines case, comes face to face with webber. He's been shunning Merideth for seasons now, bring in the one he fired for not being good enough, to help save his bank? sorry, wife. Fuck. Yes.

Have Iz a very secure and confident woman and put Bailey in her place the first time they interact.

Izzy should come in and be the new Addison.

(My story doesn't care about that guy that ditched the show and couldn't bother to show up for a final episode, 16 years, who cares)