Leafeon and Sawsbuck are quite different. Leafeon has better Attack, a stronger Grass STAB (it not healing you kind of sucks), better Defense, and moves such as Wish and Heal Bell. It's also nice not being weak to Fighting.
Swords Dance sets aren't outclassed by Sawsbuck - they take a different approach. I'm considering using Swords Dance / Synthesis / Leaf Blade / Frustration. It'd work as a bulky booster, obviously. Just because it doesn't have STAB normal, Horn Leech, Sap Sipper, and Nature Power doesn't mean it's outclassed. Play to its strengths.
Let's not be narrow-minded here; that won't accomplish much. Explore the options!