While I do agree that the trade is skewed in the Rangers favor here, you have to look at the value of the pieces involved as they sit right now, not when they were drafted. Lundkvist's value has skyrocketed since being drafted. The guy is having a Pettersson-esque breakout season and would obviously demand a hell of a lot more than a late 1st, which is where he was drafted.
Juolevi still has potential, but his stock has certainly taken a massive hit since his draft year, with some people going to far as to proclaim him a full on bust. While this is obviously way premature, he most certainly isn't worth the 5th overall that we used to draft him. I doubt he's even worth a 1st rd pick at this point.
You also didn't bring up Andersson in your analysis, who probably has comparable value to Juolevi right now. So let's consider Andersson/Juolevi a wash and remove that part of the deal. It essentially becomes 1st/Virtanen for Lundkvist. I said in the thread on HF that I thought it would be foolish to sell on Virtanen right now, just as he's breaking out, but considering our forward depth going forward, the lack of a gamebreaking RD in the system, and just how high end the prospect we'd be landing is, I don't think the price is all that unreasonable.
edit: Pettersson-esque is an exaggeration. Realized that as soon as I hit reply, but still, the numbers are super impressive for a 19 year old in the SHL, and considering RD is one of the most difficult positions in hockey to fill, the kid has a ton of value.