Bigger 'Touch to tall' button on mobile

Overall the app is pretty good. I can functionally make calls, comment, @ people, etc... However, I'm on my mobile a lot. And I got sausage fingers. The 'touch to talk' button is way to small. It would be wonderful if, when I'm looking at the chat screen, if the lower half of the whole screen was just the 'touch to chat' button. Or the option to resize that button existed.