The NFL draft drew a big rating last Thursday , pulling in 13.2 million viewers across ESPN, ABC, the NFL Network, YouTube and various social media platforms. That viewership number, was down, however, from last year’s draft, when 13.6 million tuned in.  Despite everyone knowing who the No. 1 pick would be (Fernando Mendoza) way in advance of the draft and the lack of high-level quarterbacks and lack of excitement overall for this year’s draft, the drop in viewership was surprising because Nielsen’s new measuring system has led to increases for sports across the board. Have viewers caught on that the draft is not a great television event? Has social media delivered a hit to the draft? Unless you have some blockbuster trades, there isn’t anything that makes the draft must-see TV anymore. The draft formula for TV is simple: Commissioner Roger Goodell announces the pick, everyone on TV, no matter the network, tells you the pick is great and the kid who is great.…