I've settled with a foot position that slightly favours the middle of my foot rather than the toes/ball of my foot like I used to ride. Bit of a compromise here, but even when using flat platform pedals I noticed that I don't ride with such an excessive saddle setback anymore. I used to think a standard 15mm setback seatpost was completely the wrong size for me when in reality, it may be borderline too little setback but still totallly in range in terms of fit.. just maxed out. This was a pretty key change for me in ensuring long distance comfort.