Too much or too little ventilation? Pictures included.

[Mosherd1]

Haha, I didn't think about that but it is a fitting color for the EE's. Yes I will paint it, my kids want to paint a little more but I will make sure once they had their fun that I cover any exposed wood they may have missed with some paint.
-Dave

 

[aart]

That's coops minimal size, if not too small, for 6 large hens, especially if predation or weather keeps them confined to coop for any length of time.
I think the ventilation should be left as is with a roost low enough to keep their heads out of drafts there.

I'd also put some support under that roof, it's sagging, might not shed water properly and if you get any snow load on there...well.

 

[canesisters]

I think that the general opinion is that you can't have too much ventilation. You can, however, have a space big enough to allow a predator to get inside.
I would make sure the spaces are securely covered in hardware cloth, if you haven't already. Then, if there is concern about wind blowing on your roosts, you could add another board (or piece of plastic roofing, or plexi or whatever) that would slant from above the space down. That would allow air flow but prevent wind/rain going straight in.

Looks like a good, comfortable coop. Best of luck with your EE's - they're great chickens.

 

[4 the Birds]

Your vents are high and they should be good for the Winter as long as cold winds don't hit the birds. I would consider adding a hinged flap to them so that you can close the upwind vent during a blowing snow; Otherwise, you will get a big snow drift in the coop. I would consider more hinged flap vents for the warm months (also cover the openings with hardware cloth).

Large sidewall vent with a hinged flap

 

[miquwid]

It looks fine. But do you plan to finish painting it? The paint so far looks just right for Easter Eggers.

Some time of paint will help unless it's treated lumber. Your coop will last longer. But yes that one side is awesome!