Hey,
I’m also a huge Newton Fan, been using it for a few years now. While Newton was down I was using spike, and switch straight back to Newton as soon as it was back up. I saw a feature that I thought would be cool, is similar to the true inbox and conversation view feature in Newton. In true inbox, it shows all incoming and outgoing messages, in conversation view it showed the entire conversation. I thought the spoke feature that now only shows conversation and all sent and incoming emails, but also groups all the emails with the same subject. For example, I receive an email every morning from USPS, it always has the same subject line, it would be nice if all those emails were grouped under one, like the conversation view.
Also, I would definitely love a spell check integration like grammerly, or something similar. It we could get something like that it would be amazing.