I'll start out by saying that his is just a minor observation I've noticed over the course of playing with Sherlock. I think you do a fantastic job of capturing his analytical/detective side, and sometimes you're able for him to observe things despite playing with characters you might not be familiar with and be able to demonstrate his observational skills really masterfully.
I will say that some of his more emotional sides, however, seem a bit off. I think that for a while you did a good job of striking his lack of balance without Joan. But, given that you updated him to season 3, the ic and ooc emphasis on Joan seems a little too much. Not that he wouldn't care about Joan nor miss her or seek his companionship, because we know that that's very much Sherlock's thing. However, you're playing him from a point in time after he'd lived in London for six months and thus learned to at least function without Joan. In canon, he also states that it wasn't so much Joan herself as it was the relationship that he missed (which arguably isn't fully true, but regardless).
You see him form a new bond, mentorship, and partnership with Kitty, which demonstrates that he's more than capable of forming emotional attachments with like-minded people who aren't Joan. Except, when you're playing Sherlock, it seems more often that you're using the lack of Joan as a crutch to justify why he isn't around more or being more "sociable" (as much as Sherlock can be). His relationship with Kitty demonstrates his ability to seek out others and form new partnerships independent of Joan.
Not to say that Joan's importance shouldn't be emphasized. But, rather, I think you should be branching Sherlock out more. You had a tentative foundation with Miko in that respect while Miko was still in game, but he doesn't ever appear to be reaching our or attempting to pass on his wisdom to worthy people. Or, for that matter, seems to be searching for a worthy person to teach and mentor.
His update doesn't seem to be reflected in how you're playing him. In season 3, he's far from cuddly, but he seems a little more vulnerable in Sherlock's sense, and has opened himself up to not just Joan, but Kitty as well. I think that Sherlock's playing in Kiseki if you were exploring that mentoring/teaching side more, because as it stands, I haven't seen a whole lot of it and haven't seen a noticeable shift in his playing since before and after his update.
But like I said, you do a great job of his more analytical and observational side, but while you're often quick to point out that Sherlock is an asshole, in some ways, I think you're overdoing it and not exploring the other sides of Sherlock's character: namely, his own brand of vulnerability and socialization.
Of course, perhaps I'm off-base here. I'm far from a Sherlock expert, and like I said, I'm often in awe of your ability to handle such an intelligent and strange character. I'd love to hear your thoughts on this, in any case, or at least explain your thought-process behind it if I am mistaken on your characterization approach.