Throw this into your hypothetical situation, that Grabban was offered a better contract at Bournemouth so the runner up suggestion was the one that both manager and assistant agreed on.
I posted this on the other thread - Jones managed the dev squad at Charlton winning the league, with our dev squad as runners up, last season. He was also assistant manager at Yeovil.
These are facts, so don't take this information as affirming that I want him to be manager.