1. I was decimated, my puppets all 10 or so of them were decimated. Guess what I like N day better even if did better on Z day. This was more active.
2. A system where leaving a faction helps you lose radiation but also resets your nuke\shields to 0 might help the balance. So would opt-ins only and time limits to each "game." Maybe a cool down period.
3. WA only OR WA +4 would be great because then it would be less about puppets and more focused on strategy, alliances (so I should not plan to make a puppet horde, yes?)
Other interesting things:
Friendly(?) fire - Some nations were generally confused and stopping fellow factioners nukes. Others were spying or otherwise engaging in sabotage.
Not having all my puppets in my faction saved some but also got one targeted by allies.