I disagree with OP, werfer is anything but underwhelming. It does a surprise voley fire any katyusha user will dream of.
The issue may reside on the way you use it OP. But regardless of that stuka is very controversial as it is right now, dont use as an example for ideal rocket arty.
Some people, including myself think stuka should be revamped
It kinda of is underwhelming. It's barrage is telegraphed + very random. Look if the allies played as static as ost, the werfer would be fine but they don't. The only thing allies have that is static is UKF emplacements against which the the wefer is a joke.
Think about against pak43/lefh the katty can still do shit(like decrew it + deal damage) but werfer is garbage vs the 17 lbr, bofor (can't decrew em can't kill em cus insta barrage means they cas just brace).
The point of the wefer being underwhelming is not the raw power or even the accuracy it's its lack of versatility. It can be used for 1 thing and 1 thing only siege. And nothing else. And that's fine but the katty does a better job at it + it's also more versatile, The stuka is outright just better no comparison. Hell even the LeFH is better.
The STUKA will never change. How long has it been since OKW was released.