I knew that Airsides 1 and 3 had some renovations happening, but I didn't know that GOAA planned to shuffle the airlines around.
I also never realized that there was such a disparity in the amount of traffic through the security checkpoints. I've seen it back up a bit on the east side, but I tend to travel on low-traffic days of the week and in low-traffic times of the year, so I've never had to wait more than about 30 minutes to get through security.
I flew Delta once in 1992, and AirTran once in 2002. Delta and AirTran are both in Airside 4, so that puts my most recent experience with Airside 4 at almost seven years ago. I don't remember it very well.
I flew US Air Metrojet several times through the 90s. It's been a long time, but I think that all of the Metrojet flights I took came into Airside 3. The last time I flew Metrojet was October 2000, nine years ago, so I don't really remember much about that building, either.
All of my flights since 2002 have been on Southwest, which operates in Airside 2. I'm most familiar with that building and I actually like it. There are several fast food offerings, a smattering of shops, plenty of restrooms, and lots of comfortable seating.