Ideas and suggestions.

Diplomacy is configured in templates. On Anarchy and Clash, it works at full strength, and nothing stops anyone from creating their own templates with their own settings (including the ability to disable monster joining or choose some other non-standard combination of settings).

If we are talking about G+U — those are templates for single player, not adapted for online. In single player, diplomacy is also imba, which is why it's nerfed there. And there is no battle length limit.

If someone makes a G+U version for online, they will be able to set whatever diplomacy settings they deem necessary.

A great response from the HotA representatives: "eat what you're given, we decided it's better this way, and if anyone doesn't like it, create your own and play, nothing is stopping you"

But the section seems to be called ideas and suggestions; accordingly, a suggestion for you to think about the aforementioned.
Since the response is in the format "it's imba—therefore it's nerfed," it clearly comes from someone who isn't immersed in the Gameplay. Then, in your opinion, should everything imba be cut, like 4 Dimension Door and such?

p.s. While trying to balance one thing, you raise another.