For search/replace, yes, at some point I would've like to replace workers but only in the selection.
I like the system-clipboard idea, it would allow us to persist different approaches to a level by pasting them into files.
Note that rotating/reflecting was very useful for that level but I don't remember seeing a list of controls that includes this.
A community chat like a Discord server would allow us to have general banter (e.g. about chasing scores on a level, telling people about keyboard shortcuts), whereas posting here, it seems we're doing a general comment about the game rather than having a live discussion. L0laapk3 and I currently do this sort of thing in an #off-topic channel of an unrelated server. I'd be happy to moderate such a chat if you'd prefer to focus on the game rather than managing a community.