Adjusting the shifter was the very first thing I did to my 2014 when I got it home. I found that it felt best when set several mm above the top reference line on the frame. Later, afraid that there is some safety or other functional reason for the reference marks being placed there in the first place, I moved the thing back to even with the top line. It is still a snug fit for my Sidi On Road boots, after awhile I got used to it.
I heard somewhere that steel toe boots are not safe for motorcycle use, apparently some have had front of foot injuries caused by the steel plate pinching when the boot got flexed in a crash. Better than shower shoes, though.