I thought "Deep" arose from the (past?) idea to release a simple version of TG2 (TG2 Basic, or something along that line) along with a complicated pro version, now called "Deep"?
By the way, in my opinion a simpler release of TG2 would be very difficult to develop.
It's often impossible to work entirely without the node-network, at least in my experience/opinion.
You can, but it is mentally quite demanding to keep track of all your blendshaders etc. etc. without actually looking at your network.
The current layout offers a "simple/basic" (using the top buttons and menus) workflow already, which probably can't be made much more easier as is.
Using the node-network only, which you're not obliged to! and could call "pro/deep", you're offered most flexibility and control.
So I think TG2 should stay as is.
At least, I'm quite satisfied at the moment with the complexity/workflow of TG2.
Cheers,
Martin