One of the main undercurrents I have noticed in the forums is that most people want to see the game balanced. Game-balance is crucial for a MP RTS structure to function so every suggestion is poked and prodded to make sure it doesn't break the game. I'm confidant that if even half of what is planned gets included in the final release SM will be a great survival or build game anyway so: focus on MP RTS.
In medieval age, peoples worked mostly for food. Now we have to work 4 hours a day and everything above is paid via taxes to warmongers, research and rebuilding after destruction - and don'T forget rich peoples which don'T work and their lawyers which aren't really "productive".
But when we have nano-assemblers and space-craft, what stops us from exploiting asteroids using methods which are toxic for terrestrial environment but cheaper?
What stops us from making a star-sized ship?
The result of my analysis of SM is that we play God as soon as we get automated unlimited mining capacity and can copy+paste produce ships from it without personal involvement required, except the will to do it.
The only sane RTS can happen with if all players are able to hurt and help each other equally, based on their skills.
The only sane Survival can happen if you limit yourself to a single factory or point-of-failure.
The only sane Creative can happen if you can show your creations on a server without having to risk it being blown up.
There is still insanity, such as sturdily claiming RTS is Creative or Survival is "who survives the server-lag".
As long as you create a collection where every byte of data is important for the whole, it's Creative.
As soon as you copy+paste to make "more" to make it "better" in combat, it will become RTS.
When these two merge, your power-level grows
exponentially which is
toxic for RTS with many factions if you aren't online 24/7 and everyone after the fresh server starts.
Survival is
- exploring the easiest at-hand solution to a treat (only works once).
- speed-racing through tutorials or a self-made checklist (works after you did #1)
- facing treats however big you are or have built - it could bomb you back to stone-age too! No personal safe-files on MP-servers.
But trolls which enjoy destruction will ruin your MP-survival game if you do not make it offline or with trusted members.
Ok, what's left?
RTS with ruled creations.
RTS where everyone is responsible for keeping the strongest in check (and if not, admins have to do it).
Destroying others without own losses leads to evil things.
If you own 1,2 or 3 equal ships, one is more valuable to you than to one which can mass-produce 1000 of them a day. Losses are relative!
Survival is ruined by warmonger trolls which invade every community - play singleplayer.
Creative is ruined by warmonger trolls which invade every community - allow fights between entities which are selected by players only.