I am just thinking about smoothness, by reducing friction and creep in a two-stage trigger.

It is likely the optimal 'release', for the second stage, is 3 to 3 1/2 pounds.
This keeps a margin of safety and probably complies with most Match Rules.

The angles and engagement are probably "OK" in the Krag trigger, as issued.

What I don't like is the 'mechanical roughness' or 'Creep', I notice in some military triggers.

IMHO - In the Krag, this would likely be improved by carefully 'stoning' and lubricating the working surfaces to reduce friction and also in improving the 'spring action'.

My 'trigger pin or pivot' idea, just seems like a possible and 'legal' way to reduce friction of the issue, "knuckle & Socket", arrangement.