First of all, I want to preface this with how happy I am with this trade. Nothing I'm about to say reduces that happiness.
I've been thinking a lot this morning about this trade from Chevy's perspective. I think, from that perspective, we have to remember to view Pionk in a positive light, rather than through the lens of the 2nd half of the season and the Rangers needs and surpluses. This is a D who, as a rookie, held down a 1st pairing position and did OK with it at first, with diminishing results as time went on. He held that position ahead of Shattenkirk and DeAngelo, as well as McQuaid. So what you're thinking with a player like that is that he's a 2nd pairing guy.
Trouba, meanwhile, is a 1st pairing defenseman, but more of a #2 than a #1. This, too, is viewing Trouba in a positive light, since there are people who would say he's more of a #3.
What exactly is the price you ask for if you're moving a 1st pairing guy? In a vacuum, does a 1st pairing D for a similarly aged 2nd pairing D and a 1st make sense? I think it's maybe a little light, but it isn't that far off. So, in that vacuum, it's somewhat close. Then you throw in the contract factors and this deal starts to make a fair bit of sense.
Personally, I do think Pionk will be a 2nd pairing D for the Jets. Like I said, I'm still very happy with this trade, especially once you bring those organizational needs and surpluses back into the conversation.