Hey, I just saw this thread for the first time, weird. I would probably recommend SS for a beginner - and often do actually - so thanks to Eric, I feel guilt-bound to answer this one ;-)

Having done SS for a couple of months way back, I remember wanting to do deads and squats every time too, figuring that more lifting -> more hypertrophy -> more/faster/bigger gains. But I tried it for a while and basically found that I was tearing myself down too much to be back up and going 48 hours later. If I was lifting as heavy as I could for those 3x5/1x5 on both exercises 3 times a week eventually I'd be so worn down that I'd be forced to miss lifts because I wasn't recovered. Referencing the stickies, this seems relevant:
"Getting excited about your training and killing yourself in the gym only to burn out and few weeks later and miss a bunch of sessions ends up being 1 step forward, 3/4 steps backward for many trainees. Getting and staying consistent and racking up sustainable gains over the long-term is what it’s about."

I was pumped to lift heavy every time all the time but ended up just killing myself like as described. So I backed off and took it slower. On a more technical level I think it has to do with the kind of CNS overtraining described in this article (same thread as that quote):

http://www.muscletalk.co.uk/article-...ertraining.asp

I found in my experience that it was better to follow Rip's program, which annoyingly did sometimes mean I only deadlifted once a week, and just get used to lifting with way more intensity but making gains at a slower, more consistent pace.

I feel like I'm missing something if nobody responded to this thread, but that's my take on why you would want to keep the a/b scheduling for SS. Sorry I didn't notice this thread earlier, been a busy week.