Ciao,
If you want to rubber-band the Vertical Flight Planning, you should love the beta 9.4. Try this... Build a flight, then touch Flight Plan, More Options, then Altitude Planning.
Now, you can touch the VP and add waypoints, even drag the route altitude up and down. There is even an Optimize that will take WiFi downloaded Hi-Res winds info into account for the flight. Give it a try. It's in Beta for iFly and Android now, however IOS is coming soon.
Ask and you shall receive... sometimes. We've been working on this one. Great timing to ask for it.