Absolutely love the Miranda
class design ever since TWOK. So to see some discussion and indeed praises for it is great.
As to the post, I've always thought of the Miranda
class as the Connie little kid brother/sister. To that end, I'd imagine the Connie could run circles around it. So I too, thought the line meant Khan's hits had reduced the Enterprise's
However, talk of the Miranda
being a dedicated vessel akin to the naval frigates is plausible and certain canon points bear this out when we consider the durability of the Miranda
class into the 24th C, the use of the vessel as a border patrol vessel [thinking the Soyuez class variant]. To my mind it is a good fit for the vessel design and how it went toe to toe with a ship of the line.