Whisky is right, dsf regeneration just requires computational time. So the problem is elsewhere, but it's certainly an issue that doesn't require more than 2 years to resolve. Unless it is a very low priority.
Nice scenery, but the lighting is still pretty strong. You might want to save them if you are planning to do a sports stadium. You might want to dim them by around 87% and make them a tad yellow/orangey-ish
I know you can get the Mobile version of X-Plane off the Android Market for $4.99 USD ... and since you have a tablet you might also want to try out Trainz Simulator it looks pretty cool.
I live on the western coast of Florida and when the shuttle lands it gives off a double sonic boom that can be heard all over the state. It's pretty damn loud too, sound like someone coming up to your house and hurling a giant cinder block at it.