Can we get an option to make all the blocks on a custom map indestructible? I know the destructible terrain is a big part of the game, but as a level designer I'd like to have the option to build particular scenarios/chokepoints/etc that players can't just tunnel through or destroy.

Probably not all blocks, but I'll probably designate a certain color (#000000) as indestructable. And of course it won't be right-clickable.

Awesome, thanks!

Do you think there's any chance in the future of having more control over intel and player spawn locations, like with a spawner block type or something?

Adding an option for a block to be indestructable is a good idea.
However the colour idea would be... odd, and frankly would also add to the awkward 'aire' of the program.

My map editor suggestions: http://www.aceofspadeswiki.com/index.php?title=User:TheGrandmaster#Map_Editor