Awesome idea man DOl Amroth is definitively a good custom settlements to make. You can be sure a lot of people are expecting this one, so it is a good choice.
I too would really like to see more cooperation between the TaTW team and the other independant modders by the intermediate of a special forum. This would really make things more efficient. But yet, They are already doing a great work so I won't complain.
The one thing that bothers me is the release date things. I know it's almost impossible to give an exact release date, but as a modder, I have always been able to keep informed the others about the progress in my work and give them an approximate period of time were my work would be released (exemple : I should be finished around July-september but there is not guarentee).
The problem right now is that I don't know when to start my work because if have no idea if the next version will be released in 1 month, 2 month, 6 month, one year, 2 year... So I keep hesitating whether I should start right now ( if the release is planned in a long time) or if I should wait a little bit (if the release is planned in a short time).
This really bothers me a lot, because I'm eager to start my work, but at the same time hesitating because I don't want it to become useless after a next release.
Apart from that : this is a great mod and the community is amazing (one of the best i've ever seen)