Ok, hear me out guys. I've been playing a bit with the (relatively) new Dori in this dwarf deck I made (Dori/Gimli/Gloin). This is a multiplayer deck, which is why Dori caught my eye. He's got Sentinel.
So I started using him, and I'm not saying he's the next Glorfindel, but he's not nearly as bad as most of us originally made him out to be.
For 10 threat I slotted him in, his stats are pretty good. 5 HP is his main benefit, he can take a lot of punishment for only being 10 threat, and with Ring Mail he quickly becomes 3def 6 hp Sentinel.
Furthermore, that ability comes in handy more than you might think in multiplayer. Giving an extra 2-3 def to a hero turns out to be pretty useful. Now I know your probably thinking "yeah, but why would you spend 2 heroes to block when you could just sentinel with him instead" well, because a lot of the time it's a matter of Dori otherwise doing nothing. I don't defend much with said deck, I take a lot of hits right in the Gloin. So Dori is available to either block if I have to, sentinel or buff up another defender. Or attack, if need be.