I think Sanji's best "Mr Prince" moment post TS is when he controlled the situation inside Capone's body. In a matter of seconds he:
- Deduced that the one behind his bounty poster and the one arranging the wedding is the same person.
- Realized Caesar's life is too valuable to Capone and used him as leverage.
- Using observation haki he felt Nekomamushi approach before anyone else and used that to his favour.
- Asked Capone for pen and paper to get close to his crewmates and toss them out.
That's pretty damn impressive. The quickness of this guy's wit...
Other than that and to a lesser extent the counter attack against BMP, nothing else Mr Prince-esque post TS. The thing with Sanji is, there's always the potential for him to pull these brilliant stunts, Oda is just not giving him the opportunities post TS. Imagine if Sanji was a captain of his own crew, with a headquarter on an island somewhere, and with the ambition to find All Blue. Such a scenario would bring out a scheming mastermind, the strategic plots would never cease. But because he's just a crewmember, he pretty much goes with the flow. Only in rare occasions when the crew is somehow stuck in a serious situation does he get the opportunity.
- Deduced that the one behind his bounty poster and the one arranging the wedding is the same person.
- Realized Caesar's life is too valuable to Capone and used him as leverage.
- Using observation haki he felt Nekomamushi approach before anyone else and used that to his favour.
- Asked Capone for pen and paper to get close to his crewmates and toss them out.
That's pretty damn impressive. The quickness of this guy's wit...
Other than that and to a lesser extent the counter attack against BMP, nothing else Mr Prince-esque post TS. The thing with Sanji is, there's always the potential for him to pull these brilliant stunts, Oda is just not giving him the opportunities post TS. Imagine if Sanji was a captain of his own crew, with a headquarter on an island somewhere, and with the ambition to find All Blue. Such a scenario would bring out a scheming mastermind, the strategic plots would never cease. But because he's just a crewmember, he pretty much goes with the flow. Only in rare occasions when the crew is somehow stuck in a serious situation does he get the opportunity.