I'm sure you'll get hundreds of submissions but select the top 2 to 5 maps you deem are worthwhile for use in matchmaking and the upcoming Community Warfare then release these back as officially accepted maps. Give credit for the creator as a watermark on the load screens.
Similar projects have been done successfully for Halo and Red Orchestra 2
While I understand wanting to keep these in-house so you can manage the development of these as designed for the community you wish to maintain, but allowing people to interact and develop for the title they've invested it will only allow for greater attachment.
Ultimately you can also tweak or update maps to your level of standards before final release without having to worry about the initial development or creation of the maps by your designers and artists - they'll just need to do fine tuning prior to release.
There are some talented folks out there that are capable of making some amazing maps. Expanding the content you already have can only really be beneficial to everyone as well.
So please take this under consideration, I'm sure the community at large would appreciate this opportunity to become involved in the development.
Edited by Mirkk Defwode, 25 March 2014 - 12:54 PM.