It would be a risk but you’d be adding a long term asset at the cost of a valuable short term one.
I think when we sit here and imagine trade proposals, I always try to give up something I'd rather not give because you have to give quality to get quality. This idea that you can pool up a bunch of prospects/players/picks you don't super value to get a player you do value, isn't realistic.
The Jets 1st round pick + Harris + Anderson, essential what amounts to our undesired trade commodities (based on a lot of what I read here or online) isn't going to bring the kind of return we think or hope for.
So yes, it would hurt to lose Matheson, who again I value very highly, but I'd do it for Necas and figure out how to fill that void with our many LHDs and picks we have over the next few years.
Necas could be a fixture on our top 6 for the next 6-8 years, Matheson isn't projected to be.
I doubt it would be a 1 for 1, but as the framework of a deal, there's something rhere IMO.