Lain your avatar gives me a snickering fit every time I see it.
Your army should get a "black pit of despair" to bring to the battlefield instead of free trees.
Haha - i have a crater for this. Any killed General is thrown inside
The smaller Dryad units are not for breaking an enemy unit, they serve as great eagles.
Sure, they are slower and cost twice as much, but they do damage...
You can let your opponent overrun them into a second unit, with i6 they will strike first and kill something. With smart placement the enemy will be decimated and in a good position for your heavy hitters.
When fighting against a horde you can "double-charge" with two units, this is giving you 24 ws4 s4 i6 attacks - not bad for under 200pts.
You can sacrifice them for mage and bsb hunting and even slip through the enemy lines to kill his shooters and warmachines.
But you can not, NEVER, charge frontal and expect to win. No matter how many Dryads are in your unit.
Somebody mentioned panictests - ITP - no problem here...
For blood and glory you will need the standard on your wildriders - sadly.
Your Branchwraith has no purpose, so (imho) she has to go. For this points you get an additional rider+ standard.
My list at 1500pts is nearly similar (Swap drycha for a TMA) and it works.
This army looks like a CC army, but you need to win by movement - this should work even better with Drycha in your list.
I play Forest Spirit MSU since the beginning of 8th ed. and have yet to loose a game (granted, i don´t play often anymore).
Try it, try something different - "All trees, no archers? No mages? No flyers? What´s his plan? Is he crazy? "
Your opponents will be shocked when you deploy. You can see FEAR in their faces (insert evil laughter here).