None of these vessels appear to have a very extensive sensor suite so how close are they expected to get to an opposing force before firing? Otherwise, they will rely heavily on external guidance for those missiles. If 2,500 to 3,000 ton variant, it should be able to have a hangar and bigger sensors.
I think they are meant to be able to operate off of other sensors data that is fed to them over a data link.
Other vessels, MPA, other patrol aircraft, particularly from the six E-2 Hawkeye aircraft that Taiwan operates. As long as they stay relatively close in, and then operate off of that data that locates the vessel groupings they are expected to attack, and then dash out to launch...I think that is how they are meant to operate.
They are similar to Type 022 (and other missile boats) but mission is definitely different . Missile boats are usually used close to shore and close to land based air support , or at least close to shoreline where they could hide . PLAN uses them like floating ASM batteries to protect its long coast similar to other countries in the world .
Taiwan on the other hand wants to use them like torpedo boats in WW1 ( see for example sinking of SMS Szent István ) - to penetrate screens of capital ships and then to attack them.
I do not think their missons are that much different.
According to the contacts I have in Taiwan, they are not meant to operate at any great distance from the island.
They are meant to operate against surface groups approaching Taiwan...particularly in the event of an invasion type force.
As such, they will remain under Taiwan's aircraft umbrella/range. and also be protected by the surface vessels I mentioned.
If they had to venture several hundred miles north or south into the China Sea or to the east into the Pacific, they would not survivie to accomplish their mission.