It was a bit weird seeing Sherlock flummoxed constantly, from Mrs. Watson to German Rupert Murdoch and yeah there were very little classic Doyle Sherlock-moments. Still, I hate it when shows just recycle the same constant shit over and over so I gotta give big props to these guys for taking Sherlock in directions others would have been afraid too, and it mostly worked.
I still like the more asshole/House Sherlock of seasons 1 & 2, but if they don't ever make any more seasons (yeah I know they wanna do 4 & 5) this seems like a good place to have stopped.
Did they ever explain why Mrs. Watson suddenly decided to go all assassin-y? I guess the bad guys explanation at the end was that he wanted Mycroft's secrets, Holmes was his lever, Watson was Sherlock's lever, and Mrs. Watson was John's lever, so I guess he must have got in touch with Mrs Watson. But that plan didn't even work (laptop delivery), so what was the point of setting all that up anyways... the bad guy just seems like the kind of guy that should have died long ago, its a bit dumb to think he could have really threatened that many powerful people before one of them just wipes him out.
Woulda loved to have seen more Mycroft scenes, in the book canon is he much smarter than Sherlock? What was that throwaway line at the end about a third sibling?