A year ago I would have thought none of these would be options, but Crawford is in the discussion as a serious contender for the Vezina this year, so I think you might be able to get more. With only 12 teams there are probably a few goalies floating around on the WW, right? And you've got Markstrom as well, so shopping Crawford makes perfect sense.
I'm not a huge fan of the 2nd deal. It seems like you shouldn't have to get stuck with Ballard when you're giving up some real quality pieces. If they can upgrade the defenseman I'd do it, or even Crawford and Iginla for Yakupov and Skinner. That should really help you in 2 years from now.
The Seguin deal isn't bad, but in my experience top-5 goalies (this season at least) go for more than that. He's 61st in the league in scoring right now. I realize that he's supposed to become one of the premier offensive players in the league, but he's not there yet. Maybe if they added a draft pick I'd go for it.
16 team, full keeper
19 roster players, 15 prospects
Stats: G, A, PPG, SHG, special teams assists, SOG, FOW, PIM, hits, blocked shots, +/-, W, SO, saves, s%, GAA, shootout saves
C: Crosby, Backstrom, H. Sedin, Boyle, Brassard
W: Voracek, Burrows, McDonald, Filppula, Dorsett, Hudler, Abdelkader, Bouchard, Ott, Zuccarello, Stalberg
D: Karlsson, Letang, Enstrom, Boyle, Giordano, Gorges, M. Stuart
G: Quick, Kiprusoff, Ellis
Prospects: Granlund, Pirri, Caron, Killorn, T. Johnson, Galiev, Corrado, Vatanen, Moore, Rundblad, Bachman, C. Johnson, Desjardins