Currently, blogs that are federated push new posts out as a brief synopsis with a link back to the originating site. For longer posts, that’s fine, as some Fediverse platforms are only geared for short form, but for short posts (e.g. <280 characters), it seems more in the spirit of federation to just push the whole message.
What I’d like to see is some form of detection incorporated into the default behavior, so that short, untitled messages go out untruncated, while any posts longer than 280 characters, or that have a title, go out with the text truncated to SMS length, with a link back to the full text on the originating site.
Beyond that, some settings options to customize that behavior would be nice, even if it’s as simple as a checkbox asking “Truncate and linkback SMS-length message for federation.”