Feature Request: Proxies / Block viewport options for Rhino Render 'Next'

Like the title says, it would be great to be able to create native render proxy objects in Rhino (without, for instance, using the V-Ray plug-in). It seems that by creating Blocks you can sort of do this (and it does appear that this is how ‘Next’ treats the copies of the block), but then viewing all of the blocks is still very cumbersome.

It seems like this could be achieved by either: (a) having a point cloud / bounding box viewport style for blocks and/or all objects or (b) having settings in creating blocks that let’s you view the new block object as a sparse point cloud