Now to Oshie. The hype surronding Oshie is a joke. He's 28 years old and hasn't even scored 25 goals in a season yet. Great player and great addition, but he's not someone a team can depend on to secure 30-40 goals. He's a secondary scorer at best and he's 28 years old. These are his prime years and he's not exactly going to get better with extra ice time in Washington. People identify this guy as a player similar to Zach Parise and the scoring touch just is not there. Parise had already scored 5 30-goal seasons by the time he was Oshie's age. I don't think that acquiring Oshie is any bigger of an acquisition than Palmieri is.
I think that's an unfairly harsh review. Guys who put up 70+ goals in the last two seasons: Ovie, Perry, Seguin, Pavelski, Pacioretty. Yeah, he's not an elite scorer, very few guys are. But just because you're not elite doesn't mean you're secondary (at least not in my book, I realise this definition isn't set in stone). He's more of a playmaker anyways and his point rates are very good - top 30 in assists/60 last two seasons (all situations), 8th at evens, very close to being elite in primary assists/60, 16th in P/60 at even strength...
Caps have their elite scorer and they got a better-than-secondary-scorer to help bolster their secondary scoring without giving up much. And he's quite cheap to boot.