Your question is to increase bounce or decrease bounce moving from 56 or 58 to 57 degrees. That’s more important for sand/lob wedge than distance control on full shots. Your turf or bunker conditions will vary from someone elsewhere in the country. With a set PW at 47 degrees, your best investment would be a quality outdoor fitting to dial in grind as well as loft for your short pitches and bunker shots. As well as select a shaft for your best feel. For partial swing use, it is common to use a heavier shaft.