Feats look pretty good, but I would dump power critical for any of a slew of better feats (stunning blow, dodge, quick draw, etc). The only thing you lack for Kensei III is sup weapon focus, which you can take at 18. The gear needs a bit of help, mostly in that you should have +6 str and +6 con by your level. A few things I would recommend, depending on if you are pay to play or free to play. First, run orchard for rares and tapestry pieces to get minos legens for head until you can get better. On auction house I would look for any +6 str or con items in belt/gloves/bracers/rings. Also look for a protection item and a resistance item. I would also run the assault on stormreach pack to get Vampiric cleaver and Maenya's Fists. Next, you'll need to decide on a specific weapon to specialize in and then re-do enhancements:
You're primary focus on enhancements will be to get Kensei III (II for now, III at 18th), Human Veratility, and Haste Boost. I know you said you aren't into clickies, but power boost, damage boost (from human vers) and haste boost combine to massively increase damage output. I would dump crit acc IV (keep 1-3), flank I, jump I, and for now I'd even dump ftr tough IV (keeping III again) to free up some AP.
*EDIT - I'd follow what Unbongwah listed, good list*