I like the Lucidchart/Slack integration for new documents but I want to work with existing diagrams in the same way as most of the time I want to use Slack to have people enhance a diagram as oppossed to start from scratch. I know I can "just" post a URL but that doesn't provide the same "Post to slack" option in Lucidchart or display the picture inline within Slack...
I suspect this is a limitation and I need an enhancement...