I tried several times in the past to start with Sencha. Even bought a Complete suite.
The main problem is that the installation is a real nightmare.
You have to install dozens of applications, with the correct version number (Sencha Archtitect 2.x, CMD x.x, SASS, Java x.x, etc, etc.) Mostly you have to change a lot of settings and files.
It is horrible for starting users, like me, to get things to work.
Do you work on a complete installation that is able to install all you need in one setup? I think you will please a lot of starting (and expert) users.
A workaround could be to prepare a Virtual Box with a Linux distro that includes all the apps you need. That you can start straight ahead with Sencha Architect, follow a step-by-step create my first app and deploy it without hussles to a device.
Can that be done. Or is it be done already...