I like the new mastery because it gives the ability to jump off any mount and glide. So if on a griffon in areas that use updrafts for gliding it can really help. You can jump off the griffon in mid air use the updraft then remount the griffon at a higher level. Now for those that do not have gliding and the masteries that go with it then I suggest getting Heart of Thorns. For those that do not have either expansion and are playing free to try the game get them both lol. They need to add more updrafts in the game as it progresses. If you think they cannot do that they already added gliding in the entire game then mounts.