After a good night’s rest I decide to share my opinion on this future DLC.
In general, you said that you were aware that the modding community was important to you. However, by blocking the ability to modify the new map, you contradict yourself. This means that you don’t care about the moderation community.
I think you shot yourself in the foot using this process. It would have been better to add the new map for free and do a paid DLC in parallel with the bulk of the content, as you are used to (building, weapons, armour, mounts, ect).
On a more technical point of view, I read that it was impossible for you to add the Island of Siptah to the East of the Path of Exiles map. This remains a big mystery as Unreal Engine allows the management of very large content over large areas. The Atlas game is a perfect example.
And in the worst case scenario, the Atlas system for people who want to link areas could go without buying 2 servers by linking their IPs via an interactive object such as a boat on the coast east of the jungle.
As a result, by blocking access to this card, you will also split groups and lose future customers who, without taking the future DLC, will leave the game out of spite.
Be careful, I understand that every job deserves a salary. But even if the money is important, the right choices are at the most.