Ok, so the push is awesome as a sequencer. I have been using it for drums for a while, and now with the Live 9.1 update coming out soon it got even better. Now you can create melodies using the Push as a sequencer.
This lets you not only automate the notes in a step sequence, but also automate your effects by step. This new update gives push a lot more features that I am really excited to check out. The video below goes through the new step sequencer.
Live 9.1 is still in beta testing and will be coming out soon. There will be other updates for people not using push such as the Multi Screen support and more. Check out Ableton.com and watch out for updates.