My new 2013 R is my 6th BMW in a row (previously I had a 2009 GS with ESA for 2 years and loved it, for different reasons). I use my new “non ESA” R for everything, canyon carving with sport bikes, to all day rides and “I” find that the “stock” shocks / telelever / shaft perform just fine, in fact I’m surprised how well it works!!!!! IMHO and for “me”, the R is better than my previous “ESA” GS, particularly when it comes to curvy roads, leaning it all the way over (no chicken strips), in fact the R is one of the most stable, predictable handling bikes I've owned (I’ve had Ducati’s, Aprilia’s and Triumphs).
Anyway, for me I rate the stock suspension at 85 to 90/100, when the stock shocks wear out in the next 15K to 20K, I’ll then get some 100/100 Ohlin’s, Wilber’s, Hyperpro’s, until then I’ll suffer with the darn good and very livable factory O.E.M’s