I agree with ljdart. I think these images would benefit from being sharper. DOF is always a challenge with macro. You might even try "bracketing" with the same EV but different f-stops to see what you get.
Also, they are very flat - no blacks, very gray highlights. I'm sure the weather was very overcast when you shot them, but if you get some more interesting light during the day that might help, or even just bringing up the black level and/or exposure in your software. Not looking for high contrast, just a bit more depth.
I love the textures!