This relates to Issue #55, where I mention that I could make it where the mod could be optionally loaded on the server to add additional features that would normally be impossible.

Non-op survival is especially interesting however, since it implies that (when being used on a server) any user would be able to have effectively creative mode. It would probably be best to use permissions in this case. However, this wouldn't be super high priority, since as @HyperSoop mentions, the mod is client focused.

That'd be beyond the scope of the mod, as it's supposed to be client-side.

I've now released editing in survival with op in v2.0.0. I will not add editing without OP, as this would immediately allow you to op yourself by creating pre-placed command blocks.