Agree.
All throughout this race, Ted has been playing catch-up, or badly fumbling easy plays. Now's the time for him to seriously put that big brain of his to work, and strategize for his real future.
At this moment, he's got leverage with Trump. By staying in the race, he keeps Rubio well back in the 20% range. If Ted leaves the race, it will result in a much stronger performance by Rubio - something Donald does not want or need.
Ted should communicate through his proxies that he's willing to hang in there to help Trump, but that he's expecting to be strongly considered for AG or Supreme Court Justice.
If Cruz drops out, I believe he will endorse Rubio.
It will expose his establishment-leaning credentials.