I think what Wally said is that he wants a mean D like Boro on the backend, when Parekh was brought up Yorkie said it could take him a while just to be as good as Brannstrom & it's more of the same. York said they need a big tough D who is hard to play against, clear the front of the net & win puck battles.
Although they never mentioned his name, the guy who best fits their description of what the Sens need IMO is Yakemchuk RD. He is a right shot D, has NHL size, has a mean streak, good skater, hits like a truck, brings some offence, but needs work defensively & that can be taught. IMO Yakemchuk checks off all the boxes in terms of what Ottawa needs & could be NHL ready much sooner. Here is the link where they talk about Parekh & what they think the Sens need.