I may be the odd ball here, but I have shot arrows 29” or so for so long that it is ingrained in my brain I think. When shooting, I “see” the arrow tip in my perifial vision. I do not use the arrow tip as an aiming point but my mind apparently does subconsciously factor it in.
^^^ This, and 29ish inch arrows for me too.
I am a tad OCD though, and I guess that's why I like continuity in my set-ups. I choose the components (same type for all my 3 bows) and tune from there, trim shoot, trim shoot etc. My arrows have always come in at that 28-3/4 to 29-1/4", and they shoot great for me (I draw just a fuzz under 28")
I've tried tuning longer arrows, but my brain just will not co-operate, and it won't compensate for the longer shaft length. I simply cannot hit where I look with them. I end up aiming instead of simply looking at my spot and shooting. Unfortunately the aiming thing doesn't work so well for me.
My thoughts, for what they are worth, are the advantages (of which a good many are mentioned in above posts) of a properly tuned arrow that is an inch to an inch and a half longer than ones draw length, do out-weigh any ease of tuning benefits there may be.
But....if your set-up tunes perfectly, and your arrows consistently hit where you look, then by all means use the full length shafts.
That's the beauty of traditional archery, we are all different and we all like different things, so if it works well for you, then it's the right thing for you.
Best
Lex