Regarding the guy breaking the Idler arm, this is a common problem with Blazers even without any suspension lift. The idler arm is a notorious weak link in these trucks, and suspension lifts only make it worse by changing the suspension geometry. There are a couple upgraded brackets out there which will allow you to use the significantly stronger idler arm from a 1-ton pickup. If you're offroading hard you may want to consider this option.


As far as body-lifts and showing frame: it is true that more of the frame will be visible, and really all you can do about that is make the best of it by cleaning up and painting the frame so it at least looks nice.


Regarding your comment of hitting your frame on the rocks or sand when offroading, this will happen regardless of having a body-lift or not. The body lift does not make the frame lower. The only way to prevent the frame, axles, etc. from bottoming out when offroading is to have taller tires which will give you more ground clearance.