Rather than a colored 5-bar indicator, make it display a real-time output like you see of other ships from your sensors. It could be a part of the sensor suite, so if you disable them, either through damage or EMCOM, then it either doesn’t work or displays a simulated output based in enabled components installed emissions ratings. Different sensors could have different displays, like the cheaper sensors have the bar screen and others the real-time display I slapped together a quick mockup of what it could look like:
Next, on the airlock status screen, when you dock, have it show the external pressure building before unlocking. Right now it shows 0kPa, then jumps to match the station pressure. It’s a small thing, but it would be nice to see something between 0 and 101.