I have finally submitted an update to the Galaxy Store for Talk to Alexa and working through the approval process. I hope to have it out in a few weeks.
It's hard to list all of the little changes that I have made to the app considering they have happened over the course of a year, but the highlights include:
Minor bug fixes to help with memory usage.
Allowing the screen to turn off 5 seconds after Alexa speaks.
Finally a Widget!!!
Internally the app is organized very differently so hopefully this also helps with battery usage.