IMO you're overrating Matthews.
We have no idea how good he's going to be. There's a chance he peaks as a low-end #1C/excellent #2C, in which case acquiring him for Trouba and a top five pick is a loss for the Jets.
A pretty straight forward comparable for Matthews exists in Seguin's 12-13 season in the NLA. Seguin at that time was 20 y/o and coming off a 67 point in the NHL.
I've seen both play in person in the NLA and also a fair bit on TV. IMO Matthews is only slightly behind 12-13 Seguin in terms of offensive ability and he's significantly better defensively.
Off-ice everything that has been said about Matthews seems to indicate he is a clear cut above Seguin in that regard too. Of course there is huge incentive to keep things under wraps in a guy's draft year, but Matthews has been playing with veterans in the NLA and they're far more willing to say unflattering things publicly than, say, a CHL organization.
There is risk in any trade, but between Matthews and Trouba, I'd say there is a better chance that Trouba tops out at what is now than Matthews topping out as anything less than a legitimate 1st line center.
In any case, each team has their own opinion of Matthews, but I'd be shocked if there weren't at least 2 or 3 that feel Matthews has a high probability of being a franchise center and would make offers accordingly.
Matthews isn't going to be McDavid. But there is a high probability he'll be as good as Seguin, and right now is as good a prospect as Eichel IMO.
Personally, I wouldn't hesitate to move Trouba and a pick 4th or later in this draft for Matthews.