Wow. Yeah. That looks like crap!
Here is another thread about VS control issues that were resolved by using at least 5.4.6 and slowing down a bit:
You have the most recent version of Map Pilot Pro which has a lot of Virtual Stick related fixes.
It looks like your issues is in using an iPad mini 4 though. You might be able to get away with it with waypoint flight but Virtual Stick controls require a lot more back and forth between the app and the aircraft. Any latency will turn into control issues.