Are there any good-competitive map/mapmaker for 3v3+ ?
Edit:
Going to try and be more clear, was in queue when I responded initially.
1v1 takes about 1 month to get to testing proper with the average persons time allowance
2v2 can take 2-4 months depending
3v3 and up can take much much longer
This is because yes, you have the map visually done, but the amount of testing required for the larger maps is astronomical. This is partially due to the large amount of players that are needed for feedback and the complete lack of replays given. Now mind you that is not because some players wouldn't send replays, but more so because the slightest change to a map will lead to a desync error and provide nothing after an update to the map.
The only way you get quality 3v3's and 4v4's for competitive is by helping out community memebers willing to do it, and currently that seems to be myself, mono, and rommel, there may be others, but I am unsure if they are interested due to timezone issues and time constraints.
There is the thought of a 2v2 version of my map making contest, and after that was the 3v3 and 4v4. The issues with running these is that the submissions periods would be astronomical and the amount of stress that it imposes on myself is large because of that.
However I do have the thought of creating a mapping "team" and trying to get together with players and other mappers to make quality maps that are developed by the community more so, this is something that I have tried to do via stream, but it is hard when not everyone has the time to make it. So I will be trying to get something in the works soon.
TL;DR there is hope for larger maps, just currently everything is in the development phase.