So Far, they've signed:
WR Pierre Garcon - good hands, used to have great speed, knows Shanahan's system
QB Brian Hoyer - had a good year with Houston, knows Shanahan's system
FB Kyle Juszczyk - he's young, good outlet receiver, can play tight end
WR Marquise Goodwin - young and fast
OLB Malcolm Smith - hated him with the Seahawks, Raiders didn't seem interested in keeping him
K Robbie Gould - I don't get too excited about kickers, I think he's blown a couple of big ones
TE Logan Paulsen - don't know much about him
WR - Aldrick Robinson - young and fast
They let go Torrey Smith, and weren't going to re-sign Kaepernick anyway, but he opted out
I think they're already considerably better than last year