Thank you. I am glod that you like Fantasy Express.
Without going the route of D&D3.x/Pathfinder (of Feats), it is difficult to make arms users more interesting. Not impossible, just more difficult
One way that this is done is through the Special Skills, which can and does include a couple of weapon fighting styles. And I do need to add more arms related items to the list of potential Special Skills. Another is through the use of the Milestones.
Don't forget that as you spend Drive Points, you progress along the "Heroic Path". For every 10 points along the Heroic Path, you gain a Milestones. This can allow you to gain additional Special Skills. I need to add some more Milestones as well, for the more combat-oriented (I have several Martial Arts related ones in there already). These would, however, go in a supplemental product, not in the core rules.
Milestones and additional Special Skills (i.e. built as Combat Styles) will eventually be coming, and work to help expand Arms users as they progress.