Now the Iowa class (Vengeance) would smoke a modern Aegis class ship--if it got close enough.
Galaxy was a ship of exploration, and it got replaced by Ent-E due to the Borg threat..but Ent-E is still a good well rounded starship. Vengeance isn't--it is a flying weapons battery.
Also, some of Scotty's transwarp beaming ideas may have gotten back to Khan, who may have been Section 31's version of Neil Turok at Perimeter Institute.
Hard to say.