Simple. You have absolute power to change any technique rules, start/finish rules, age up rules, sky is the limit as long as the rules pertain to swimming. What would you change and why?
I'd create a few new events... the 100bi and 150tri + other distances of course. The bi and tri events would involve swimming your best 2 or 3 strokes. You could use any combination of strokes but each leg would have to be of equal distance ie a 50 fly and 50 free = 100bi. Add a 50 back and you've got your 150tri. Besides, it also meets the qualifications for those above who want to outlaw breaststroke.
I'd create a few new events... the 100bi and 150tri + other distances of course. The bi and tri events would involve swimming your best 2 or 3 strokes. You could use any combination of strokes but each leg would have to be of equal distance ie a 50 fly and 50 free = 100bi. Add a 50 back and you've got your 150tri. Besides, it also meets the qualifications for those above who want to outlaw breaststroke.