It feels so much easier to proof read a text message after it has been sent. On important texts my wife and I send them to each other, just so the message can be seen in a much easier to read format, not so the other party can read it.
A great feature would be a preview button. Certainly not a forced preview button before sending each text, but a preview button that can be used as and when. From there, if you want to edit, you can easily, if you are happy, then you can send.