I miss a anti-ship missile like Exocet MM38, should be able space to fit these.
Well...I think there is no space, if the MM38 isn't capale of rail launch from the seadart launcher, to the cost of seadart or subdart missiles. These ships are designed before the MM38 entered service aswell. The IRL type 42 didn't carry them either, because there is no use for a SSM on such a ship because they would be fighting enemy surface ships, if they get close enough they use the SAM as a SSM or stand off attack by Seaskua armed helicopters.
I would prefere a larger caliber gun though, like a twin 4,7in or even 6". Feel free to compare to my
"Mannerheim" class which is similar in mission but a bit smaller.