Impressive. I briefly compared running standalone client next to a plugin.
First of all, amazing job. Discord standalone client consumes more than a 100mb of RAM, while miranda is under 10mb for many protocols at once. That's a major debloating for something as basic as text IM when voice chat is not required.
Online status seems to work fine, however, client sees itself as online in group chats lists even when invisible, but it's probably an intended behavior.
Most of the unimplemented stuff, unsurprisingly, goes under group chats.
Group chat nicknames are not working (everyone is displayed as accountname#nnnn, including own name). I assume, this is because discord user can have unique nickname on per-group basis and it's not supported yet. Group chat motd/channel title is not displayed in group chat window. Group chat direct highlights don't work yet (@nickname as seen in Discord becomes <@nnnnnnnnnnnnnnnnn> in Miranda). Group chat channel highlights are not decyphered (<#nnnnnnnnnnnnnnnnnnn> instead of #channel in Discord).
Group chat log is named after internal channel id (nnnnnnnnnnnnnnnnnnn.log) instead of group#channel.log.
Users with group chat moderation rights are not marked or highlighted via color in the channel chat window in any way.
The biggest disadvantage compared to native discord is probably the lack of discord group chat history sync (i.e. listing messages sent per channel while offline). Is this supported in miranda globally? I've noticed this is most likely the case with skypeweb and other group chats, excluding third-party assisted (IRC BNC services).
Thanks for keeping desktop instant messaging alive.