Twitter has an Add new Tweet feature (see image). Halcyon does a fine job of depicting a thread that includes replies. When a toot is replied to, you see both the original toot and the toot with reply thread in different places in the same timeline.
What if the Halcyon toot dialog had an Add Reply icon on it, to allow you to create a toot thread using replies, to allow you to bypass the 500 char limit per toot?
Nice idea,I will add this to my todo list.
I can't say now when it will be finished but as always I'll try to work on users wishes first.