Only the very edge of the blade cuts, and only about 1/8" of the blade max is exposed in front of the chip breaker.
That may be good for a jack plane set up to be used as a scrub plane.
There are folks here who would be screaming about their chip breakers being more than 1/64" back from the blade. By some folks figuring, that is even too far.
Search > setting a cap iron < to find an article on Wood Central by David Weaver. The link to the Kato and Kawai video no longer works. It may be available on the web somewhere.
My suggestion is to keep it simple. If a flat back and a decent bevel isn't working, ruler tricks, secondary bevels and cambers are not likely to make things any better.
jtk
"A pessimist sees the difficulty in every opportunity; an optimist sees the opportunity in every difficulty."
- Sir Winston Churchill (1874-1965)