Maybe this is a wake up call with regard to the SOP of leaving the throttles unguarded after V1 is announced.
Be careful when you fix one problem that you don't generate a load more. If you were to change this procedure I would suggest you risk an unnecessary stop after V1 even more!
My feelings on this incident is that it was an extremely lucky escape from disaster - a shorter runway and the outcome would have been much worse.
We obviously don't really know precisely what was going through the first officer's mind to cause him to reject the take off. However, safe aviation is based on certain disciplines, many of which have stood the course of time and are based on some very hard experience. In short, if it ain't broke don't fix it!
I only wish 411A was still around - I can imagine what he would have to say!