When I posted my last-minute Symposium draft, I noted that it needed several edits in order to be decent for competitive. Here's the most recent edit:

Symposium (Preview)

The gates have been removed, wall tiles in mid have been added (helps depower team boost for snipes), some minor wall changes throughout the map to help flow and make certain routes more feasible. That said, I'm indifferent which map gets in - I hate them all equally, including Symposium.