When playing for the Mors clan at the initial stage, using the unique mechanics of the Mors clan, it is more profitable to buy 4 technologies for ordinary clanrats than to buy 5+ technologies for Mors clanrats
1) All your armies already have regular clanrats
2) In all your garrisons there live many ordinary clanrats
3) On the first turn, the game situation favors improving ordinary clanrats (and once I started studying ordinary clanrats, it’s difficult to stop)
4) Armies received from confederations will have regular clans
5) Ordinary clanrats come out of the ground, not Morse clanrats

And from the middle of the game it is easier to upgrade from ordinary clanrats to stormvermins (after all, there is an all-faction LL bonus for recruiting stormvermins for 1 turn for any lord), and spend the unique resource of the Mors clan on anything, but not on Mors clanrats.

My suggestion: make Morse Clanrats more accessible at the initial stage of the game. At the moment they require too much investment...