There's nothing wrong with the Guy Ritchie directed movies, I've seen every Sherlock adaptation there is till this day and those are one of the most amusing movie adaptations. That aside;
I think Elementary will get more to offer, they should re-do some original stories to keep things more interesting than these boring episodic cases. I've loved Sherlock since ever and I really enjoy Johnny Lee Miller's take on it, but I find the show to be quite boring.. or well, at least, the cases. They are all so easy and I solve them in no time on my own. The portrayals are fun, that's the only thing that keeps me going. It's a fun hour a week.
So yeah, they should up their game, do some actual Sherlock stories, get more of the books and short stories characters or do a more interesting series of episodes with Moriarty/Adler.