Everybody who saw Star Trek Into Darkness saw the Vengeance and how it functioned, and wondered how such a ship could be a part of Starfleet even though it violated the principles of Starfleet and the UFP. An even bigger wonder is if this ship, despite its destructive potential, could be rebuilt into a standard peaceful Starfleet ship of exploration instead of the warlike creation of a power-mad Section 31-affiliated and allied warmongering admiral?
That's been answered with this concept for a post-Vengeance starship of the same class, but as a ship of exploration and peace rather than as a ship of war; the USS Ascendant, as created/visualized by calamitySi at deviantArt:
U.S.S. ASCENDANT Orthos
Another pic of this ship, but from the bottom:
U.S.S. Ascendant 1
In other words, 'Would Starfleet and the UFP get rid of this ship? No way, they'd keep it instead!'
That's been answered with this concept for a post-Vengeance starship of the same class, but as a ship of exploration and peace rather than as a ship of war; the USS Ascendant, as created/visualized by calamitySi at deviantArt:

U.S.S. ASCENDANT Orthos
Another pic of this ship, but from the bottom:

U.S.S. Ascendant 1
In other words, 'Would Starfleet and the UFP get rid of this ship? No way, they'd keep it instead!'