Less muzzle flip is better.
Part of the problem is peoples expectations of what handgun porting is designed to do. Many think it reduces recoil and are disappointed in the experience. As you are obviously aware, it reduces muzzle rise.
I have been carrying ported firearms for decades. I have a ported PC Model 940 Special with me right this minute. It is one of dozens of ported forearms have I have owned or shot
Most of what you hear on the Internet is more Internet rumor than fact.
Cheap practice ammunition is loaded with inexpensive powder that lacks flash suppressant. Most all of your Premium self defense ammunition offerings have a flash retardant added to the mix so this notion of being blinded by your first shot is not the case.
Additionally, if the blinding issue were a true fact, it would be a problem for almost EVERY Revolver out there since gas escapes the barrel cylinder gap long before it reaches a port.
When was the last time that you, the shooter, complained about the muzzle flash from the B/C gap?
Porting is not for everybody, some folks just can not warm up to it. Try it for yourself. Have an open mind and then decide.