You're missing the point Citrus...when everything is in place, the head should lower to a decent relaxed position given on how the horse's body allows.
I think the trouble with WP is that often there is so much exaggeration "you have to have such and such height" that alot of horses who would naturally have a little bit higher head set than desired, are forced to ride with a lower head set. It used to be that with pleasure, the head set wasn't the 'main focus'...the horse was judged on how nice of a ride he appeared to be...ie, did he appear to be a "pleasure" to ride or not...was he responsive to cues, or was he evading the bit, or rider legs, etc.
Honestly if a horse is collected, IMO there is no headset that is too high or too low...it's the collection and engagement that matters to me...if the head set is nice and low, that's a bonus.
Now if you are going to show, probably one of the things you'd have to work with is a set of draw reins, to get the horse to tuck his nose in a tad...however, that would and should come last, once collection is acheived, and only if you need the nose to come in and more break at the poll achieved.
I never have used draw reins to achieve a more tucked appearance; I like to use alot of bending and flexing; he has to bring his head down, and nose in, to flex properly, and when he does that well, you can pick him up either side, and then let him go; eventually you would be able to pick up both reins, ask for the give, and the horse would break at the poll and bring his head down and in, instead of having to do one side or the other.
"The ideal horseman has the courage of a lion, the patience of a saint, and the hands of a woman..."