I already made a thread about this idea in May. I hope the devs will listen. You might wanna give your opinion as well in the thread i made.
One of my suggestions is having some map creator contest every month. The winning map will be turned into an official map and would be part of the next map pool.
You can make this contest as wild as you want. You can for example give it a theme. You can expand it so it is for scenarios as well to give Single players some love as well. Or just alter a new random map and a new scenario every month. So one month the contest is for the random map. Next month it is for scenario. The possibilities to use fan made stuff is endless. The sky is the limit.
And knowing your submissions is for the contest means submitting = permession for the devs to put the map / scenario in the game. So this will also solve the issue around the point of Cross/Four Lakes.