It sounds reasonable to take a while and think about, who use wich media, and why we make it.

1) As was said, ask server images users, how they prefer and how they actually install Fedora and make decision based on it.

2) Just a thought - would it be more efficient to test ISOs in VMs to some point?
For example, till the Alpha release, evertyhing mentioned here as a subject of possible changes could be tested only on VMs. After Alpha release, test would change to manual on real HW.
 - again, it depends on how often QA come across bugs that occurs on real HW, but not in VMs.