What kind of shooting are you prioritizing? Plinking? Defense? Bullseye?
Here's a good read from Gabe White on vision and shooting that addresses, among other things, the virtues (for some) of target focused shooting.
Bottom line, see what you need to in order to get your hits, there's ultimately no right or wrong if the results are good -- and yes, that includes the old "front sight focus" idol falling, too.
Vision – Gabe White Training
Lastly, consider a quality red dot sight; the only thing you have to focus on is the target -- no more three plane management or lack thereof.