I don't agree with bobbythebrain too often, so I'll just take a second to agree with him on a couple things. Dumba's hockey IQ really does seem to be lacking, I wouldn't compare him to Yakupov, but he seems to make about as many dumb mistakes as he does good plays, Minny fans claim that his good plays more then outweigh his blunders, I haven't personally seen evidence of that, but I obviously don't watch him as much as they do. What makes Dumba appealing is his shot, he is basically top 5 in Goals per 60 on the powerplay for d-men in the past 3 years and if you can get him playing the right way more often he does have all the tools to be a big impact player, but I think his lacking hockey IQ will likely stunt that to a fairly substantial degree. Just as an aside while Dumba and Barrie both get knocked on for their defensive game, in my viewing experience Barrie has done a much better job of ensuring the good he does outweighs the bad he does.
Then in regards to Shane Doan, he's not the player he once was obviously, but in watching him last year I still think he has some game left, I wouldn't completely turn my nose up at the idea of adding him. A lot of people were on the Iginla bandwagon and while he did play quite a bit better for LA then he was playing for Colorado, Iginla played much of the season like he didn't give a damn and defensively he was completely atrocious and he didn't seem to be winning any puck battles. Doan though did seem to still very much be a competitor he has slowed down, but he is still working hard and didn't forget how to play defense just cause he got old, his shot volume has also remained high. If he wants to sign here for 1 year at $1.5M and play 12 mins a night, that is fine by me.