The no Bpts was used successfully in the NL in 1989-1990 and didn't result in any average fiddling .The one guest rule has been used before in the lower league and again worked reasonably well , the only problem will be if you have all three heat leaders injured. It will pay to have a strong top 3 next season,you can cover better with R/R and the golden double.Can't see too many teams using untried youngsters though,you don't want to have a long tail especially away,unless you have a super reserve partner.