Based on that diagram you actually wouldn't have mountain ranges in a couple places. Mountains don't from because there is a fault line. They form, typically, because one plate is moving underneath another plate. For example, look at North Arafran. See how the arrows are pointing away from each other? This would not form a mountain range. Instead it would create a canyon or rift, and actually break the continent apart at some point much like South America and Africa. Note how the mountains in South America are on the western side. That is because the plate is pushing away from Africa and into the South Pacific plate.

Of course a lot of it is also going to have to do with the age of the world as well. The younger it is the lower and fewer mountains there will be.

And of course we can't discount magic in a fantasy setting. Once magic enters the picture you can toss out any 'real world' issues.

You obviously have put some serious time and consideration into the world and I would love to see how it evolves as you continue to move forward.