1) I'd like to be able to embed the tweet as a link, so instead of 'insert link' as a link, just have it be the tweet on its own. Thus I can use the embed feature :)
2) Manual posting should have a 'trash' button too. Publish or turf :)
3) A 'run now' button would be cool!
Also there are minor English typos throughout (WordPress, capital P being the most standout, but also Twitter gets a capital T) and you're using cURL directly when wp_remote_get would be better.