Unfortunately there's not really a tester's guild or regular lobby for testing/feedback around these parts like Reach and 4 anymore.
I guess you could still try by just posting a regular thread and invite people to help you test a map.
--- Double Post Merged, Jun 18, 2015 --- No.. thats where maps are posted when done... no one gives real feedback there. Im taking about a work in progress thread where maps are tested weekly and are given feedback.