You can substitute 2 tablespoons maple syrup and 1 teaspoon vanilla extract for the vanilla-flavored maple syrup.
You can frost these with a powdered sugar glaze if you like. Use 1 1/2 cups powdered sugar and about 5 teaspoons water. Make sure the glaze is very thick.
I use this basic recipe (minus apples and cinnamon) for all my scones, just varying them with blueberries or chocolate chips, because they keep the best of all the recipes I've tried. For a biscuit-textured scone, add 1/2 cup more flour.