I like Granlund as a long term guy but I would stick with what you have for the rest of the year. You have some solid long term keepers right now and they will help you in your attempt to grab that 7th place and 1st overall pick this year.
All in all I would stick with what you have and target Granlund with one of your early draft picks.
All the best!
13 team Roto keeper league 12 F, 6D, 2G, G,A,+/-, PIMS, Hits, TOI(D), GAA, SV%, (Forwards are forwards, no distinction between L,R,C)
F) Ovechkin, Stamkos, Kunitz, Parise, Byfuglien, Backstrom, Little, Gaudreau, Hudler, Brassard, Girgensons, Nelson
D) S. Weber, Phaneuf, Subban, Carlson, Josi, Vatanen
G) Rask, Jones