In the text messages, other than sound, (If you even have that turned on) you cant really tell when the message is sent. If the text bubbles had a slightly lower opacity while it was in the process of sending, the became a solid color once it sent you could know exactly when it was sent. This would make it much easier to see that the message has been sent other than the sound. It would also be helpful for those hard of hearing because they would be able to see when the message was sent rather than listening for the sound.