This was my story too. Worked out great with no door between the coop and run! ...until I found myself the owner of a rooster.
Now I've had to come up with a makeshift door to keep the birds in the coop until 8am during the week and 9am on the weekends for the sake of my neighbors.
I'd say, if you're in the planning stage, plan in an easily opened and closed door. You can leave it the heck open. ...until you have a rooster and neighbors who want to decide for themselves when to get up in the morning.
But, as someone said earlier, make sure your run is predator-proof! Mine has hardware cloth dug into the ground 12" and 12" concrete pavers 360˚ around the perimeter, carabiner clips on all the openings, steel wool jammed into any space light can get through and a secure roof over all. Make it predator-proof. Really, make it predator-proof or just don't have chickens. You'll save yourself so much heartbreak and time trying to eliminate rats, etc. ...and save on feed bills when you aren't feeding the local wildlife as well as your chickens.
Ah! The joys of living in a rural setting! I hear my boy out there at 5:15 some mornings. I don't care one bit if he wakes my neighbors. He's just returning the favor for the number of times their dogs have woken me.
And I'll be up to three males this summer. Should be a hoot! Oops. I mean a CROW!