I can see reducing the limit from 5 to 3 for co-anglers as the pro’s spots should then still contain the fish even if they were previously caught.
Including the pro’s catch with the co-angler’s catch? This alone ruins the co-angler division. Additionally it will probably lead to more pros blocking their co-anglers on prime spots.
No talking about fishing spots/techniques between co-anglers and pros. Pros don’t listen too closely to co-anglers unless they (pros) aren’t catching fish. What a boring day for the co-angler since it mostly eliminates any conversation about fishing.
That ruins it for me. Especially with the temptation for cheating between the co-angler/pro.