They can reverse the trend slowly. If bodybuilding wasn't about selling persona's and images ie Branch , Heath the process would be alot easier. They have a whole generation now thinking its ok to look like Rich Piana or Warren , when the more experienced fans and lifters like the ones on these boards are clearly in disagreement.
The problem is it will seem like regression. Look at the 1990 olympia. Good idea on paper bad in practice. I akways say the same when people shite on about perfect drug testing. Everyone wants to see a clean race. Bullshit. If people ran over 10s in 100m noone would care they love progress like bolt.
For bodybuilding one simple thing would be to change the lighting. The ridiculously strong lighting aimed front on means bodybuilders have to use stupid shit like dream tan and any minor imperfection is exacerbated. Look at the 99 british gp. Either every athlete was amazingly ripped or the lighting was kind and they all looked great. Then size, flow shape etc can take precedence over being dehydrated to the point of nearly dying.