I do let them out a few hours most days, but there are some lengths of time they go without that level of freedom.
Yeah, this is a mid-urban backyard in Chicago, and not only mine at that. The kids need space to play, too. Granted we weren't initially planning on keeping this many of the new batch, and I'm kinda playing it by ear as far as whether or not to pass along any more.
Free range time does help, but if it's a couple hours every few days, it really doesn't make up for tight quarters.
In the long run, this may or may not work out - you'll just need to keep an eye on their behavior. I certainly don't expect them all to be instant friends but obviously you don't want any birds getting injured, being chased away from food, or bullied to the point that they spend all day hiding. If you can't expand the set up then rehoming a few birds is also a solution if things don't work out.