Where I live I don't see many mountains that have Bryce Classic shape to them, so the thing I want to do is look for something more natural to me. If you live where there's Bryce Classic mountains feel free to use what's natural to you.

Bryce has capacity to make lots of different shapes, but once you use the fractal generator to make them you have to fiddle a bit to make them workable again.

Click on the downward pointing triangle to the right of the word 'fractal' in the 'Editing tools' panel (1). In this screenshot the arrow is hidden by the fly out menu that will pop up when you click the triangle. There are a lot of choices there and it's great fun to play with them. For the purpose of this tutorial I chose 'Rounded Dunes'. Just ticking this option does not give you a new terrain yet. You have two options, if you click on the button the left (2) of the word 'fractal' you will get an entirely new terrain. If you click and hold on that button you will find a double headed arrow comes up which you can slide to merge with the existing terrain. (No screenshot because the arrow disappears when I try to capture it). Either works, depending on what result you're aiming for.

For this tutorial, click once on the button to get a new terrain.