Worse combustion chamber design ever? Saveable?

IMO valve shrouding is a term thrown around way too much so people can sound like they know what they're talkin about. In 99% of the cases, any "valve shrouding" you think might be goin on doesn't amount to a hill of beans.
I agree with that, but I can attest that this type of blockage of the intake charge because the valve has a literal wall around 75% of the valve will kill higher rpm flow. It's great for low end torque. I used to do alot of relieving on flat heads where the valve is obstructed 100% until .150 lift. After you relieve, you gain a ton up top.