I haven't ridden in draw reins very much but have seen it both ways. My trainer had me ride my gelding in them for a couple of lessons.She uses them on the outside,so it allows horse more freedom to use their shoulders
If your horse is overflexing & bringing his head into his chest then you shouldn't be riding in them
You shouldn't be using them to trying to pull them into frame
I found Because I has not very familiar with using them I was scared to pull on them because I was afraid that is what I would be doing pulling his face in. It wasn't that bad & actually I found I was more aware to maintain by hand contact light & it had me driving him up more into contact
Agree that there way to much misuse of them & not for your average rider to be trying out
I know until I felt I was more confident in using them I will not be trying them out on my horses for schooling without supervision/coaching.