No, not with Version 2.1 (3B42) of Apple Configurator. There are some workarounds that come to mind:
- You could make smaller groups and keep the same blueprints
- You could determine the limiting factor in your MDM responsiveness and address that to handle 50 devices at once.
- You could re-implement the blueprint in a script and have that script iterate over the group with delays that resolve the bottleneck.
It really depends on what you are doing. If you cannot add a simple blueprint that adds one Web Clip to all 48 devices, then you might need to rethink your MDM or infrastructure. I'm having a hard time imagining something that saturates a link to MDM since they generally are quite efficient and just transfer configuration data and not loads of document data.