Is the Constellation class a downgrade from FREMM or inferior to Type 31 and Type 26?
Short answerIt is an Americanized FREMM suited to US requirements and belongs nearer Type 26's high-end tier than the cheaper general-purpose Type 31.
NotesConstellation is a heavily modified FREMM derivative designed around American requirements. Its intended role places it nearer Type 26 than Type 31. Type 26 is the escort called when a carrier group faces a serious submarine threat. Type 31 provides a cheaper general-purpose hull for forward presence and places where the threat is too high for an offshore patrol vessel. It can also serve as a carrier's last defensive layer. That role exposes a frigate and its roughly 150 people to a weapon intended to kill a carrier, which makes casual descriptions such as 'missile bait' dismissive of the crew's risk.