Just wanted to say that I agree with you both - I'd rather less red carpets and more acting and I'm convinced he would, too! (I never think he looks 100% comfortable at these things;), but just like many other careers, you have to do a fair amount of networking and keeping your profile up if you want your career to progress, and it's the same with acting.
With Sherlock, I'm not convinced it won't film this year even if it's not shown this year.
I can't think of any other TV network that would have a show as popular as this, that would allow everyone to walk away at the end of each season, without agreeing a date for the next series to be ready.
They plan TV schedules months in advance, not weeks, so I find it hard to believe they've no idea when they'll be ready to show it.
What I would say is, if it doesn't film this year, then I hope we don't hear that it can't film next year because Benedict's too busy. That wouldn't be fair, when we all know there have and will be, windows this year when he and Martin were available.
Also, lack of filming work this year isn't Benedict's fault - I know that's not thought by anyone on here, but I've seen elsewhere, other "fans" talking as though he's chosen never to act again!
If he pulled out of Crimson Peak (and personally, I'm glad he did), then yes he'd have a few months with nothing on, but at the beginning of the year, he believed he had two other projects set to film - one was LCoZ - he must be as frustrated as anyone that they've fallen through.
Someone on a forum for Robert Pattinson made the very intelligent and respectful comment that Ben's "fandom" is relatively new, so are not used to the delays and falling through of projects in the way other Actors' fans are, but in fact these things happen all the time. She also said that this is essentially Ben's Movie, so when it does start filming, the schedule will suit him first and foremost.
Another high profile Actor pulled out of a project recently just days before filming was to start, giving no reason, with his fans having no clue as to his next project, so it's not just us that suffer!
I do wonder how Ben will fit in LCoZ, Blood Mountain(?), Hamlet and possibly Richard next year as well as Sherlock if they do film it then, but I think/hope that suddenly things will start moving again for him and we can see him on screen and stage again soon.
(Sorry for the very long post)