There's actually a very easy and almost foolproof way to exit the stairs at least at all but lowest tide. Keep in mind I'm carrying my housing on every dive so that makes it trickier. It does take a little practice. Here is the way I do it:
Swim in towards the stairs, surfing in with the swell. Grab the upright at the end of the rail with your left hand and do a 180 so that you are facing towards the ocean. As you do this, plant your finned feet firmly on the lowest stair. Quickly walk up backwards to make room for those coming in behind you. It has worked for me over at least 1,300 dives since the stairs went in.
If the tide is very low, I usually go in to the right of the stairs through the channel behind the big rock. It is fairly easy to work your way in through that channel (as long as the feather boa kelp isn't thick). Then plant your feet on the rock and reach across to the lowest step while holding the upright at the end of the rail.
These approaches work for me. Your mileage may vary.
Dr. Bill