Keeping eyes on target is only useful for accuracy shots. It definitely reduces power a lot. Also trying to turn your back towards the target and forcing eye contact for as long as possible is mixing max D style and golf accuracy shots which easily hurts both.
In time it's normal to throw with better form, more consistency and accuracy when eyes are constantly on the target then turning away for more power. In 2003 worlds DVD Juliana Korver said she never throws at 100 %. More like 80 % and close to 100 % on uphills.
With 80 % power you can keep eyes on the target and use eyes, body (I use upper arm at full reach back arm keeping a straight forward pull afterward), momentum and increasing weight of the disc while properly accelerating at the end of the late acceleration for aiming. Simultaneously which at least for me helps with accuracy and repeatability tremendously. The difference is large to anything else I've tried. So much so that with the shifting winds around here I've gotten better results using a bit faster discs than necessary for any given D (up to fairway drivers) on uphill throws for both wind resistance and not using full power to minimize the chance of a wrist roll over and other full power influenced problems. Like exceeding the cruising or flipping speed combined with a possible gust mid flight. I'm not forced to use reduced power because I can't control my wrist at least until late in the day or after fierce weight lifting exercise without recuperation.
It might partially be mental because I've also gotten better results with a Leopard against a broken in M Sentinel MF on holes where I only reach good putting D and lateral accuracy on a small percentage of shots thanks to being outside my golfable D with the Sent being uphill. This is a hole where I practice often after rounds when my friend leaves. A leo ain't nearly as wind resistant as a Sent. Not even close. It's just trying to nut 105 % is not likely to produce pretty results vs a less wind proof disc at 80 %. With a Sent I need to turn away fully and with the Leo I'm reducing power everywhere keeping eyes on the target and not turning away half as much. That much magnitude of difference between eyes on and off target. Both ways must be learned for competition play. Both ways are needed on well designed courses that have been designed with say post Leopard era. And championship courses of way earlier than that.
Flat shots need running on the center line of the tee and planting each step on the center line. Anhyzer needs running from rear right to front left with the plant step hitting the ground to the left of the line you're running on. Hyzer is the mirror of that.