The Tuuli-mess was a sad thing indeed as if completed it would have represented the ultimate coastal naval warfare thinging and would have given us a truly innovative and unique class of warships. It would have been ideal for finnish coastal enviroment with rough archipelago and rigged coastline and shallow passageways.
The reason why it was abandon was the idiotic desicion to make tradditional naval operations of securing the sea traffic as the primary mission of Finnish navy. There is no idiocity in the doctrine itself, its just that the finnish navy isen't build for do such role. The new doctrine would require western type frigate-focused fleet, but now the hamina class which was intended to serve as a flotilla leader for the Tuuli class are now suddenly given roles of frigate or corvette, when the ship clearly isen't such a vessel. Aside this the Hämeenmaa class minelayers have been rebuild with bowramp deleted to give them better seekeeping qualities so another vessel mented for completely different roles is sacrified with the need of "blue water" navy.