Which players currently do you consider to be 'good offensively and weak defensively' ?
Fairly weak defensively are Mo and Nylander. Tavares is average at best.
Matthews and Marner do give up a lot of chances, and goals while they are on the ice, but they make up for it by being elite offensively. Their games are much more rounded than they used to be for sure. If they continue to work on their D games, I'd even say they have a chance at being quite good.
Matthews is having a tough start to his year though. Nothing to get worked up about, it's only been a few games. Historically he's been excellent at faceoffs, but he's struggling so far... I find he hasn't found his groove overall yet, and I'm not sure why... he just isn't as comfortable as he normally is... maybe trying too hard for now.
Again, only three games, but Rielly and Brodie have been tire fires so far defensively.
In other three game samples, as much as Tavares and Nylander haven't been that strong defensively traditionally, they've had excellent results so far. Maybe this is the year they step forward defensively? Who knows.
Our bottom six is constructed of some pretty defensively sound guys. They aren't the best offensively though.
It's just my opinion, that if we are looking to add to the team, we bring in guys who compliment what we have. I think our needs are D, and maybe G (let's see how that plays out). If we obtain D, or a forward, I think they have to be strong defensively, and with some size. We have a lot of forwards who can be at least decent offensively, and quite a few average sized guys. Defensively we don't have much in the system with size.. it's our one blindspot.