Such as?
I'm not a fan of this patch since I've always used pauses to already queue some commands in advance.
This doesn't seem like it should be allowed to happen, as if the game is paused, it should be (by definition) actually paused, and prevent players from spamming commands (possibly unintentionally, from new players) that can build up without any response or indication from the gui.
Besides preventing players from sending useful diplomacy changed messages, it also doesn't prevent sending of useless (duplicate) diplomacy cahnged messages, so the title is misleading.
Actually, if one follows the test plan for this diff, they would notice it does prevent sending of useless/duplicate diplomacy changed messages, so I'm not sure where exactly this is coming from.