Assets still remaining because of the Jones-Johansen trade absolutely matter in evaluating it, yes sir.
My point is that Columbus turned Jones into a wealth of assets, even if it was a lopsided trade (the Jones to Chicago trade). The same summer as the Jones trade happened, Nashville was leaving Johansen unprotected in expansion drafts. Yes, I understand Johanen had a rebound year, but good luck making a Johansen trade proposal with a return for Nashville that was comparable to what Jones' return was. CBJ new assets are worth far more that Johansen currently. Asset building 101. Even if Nashville didn't 'lose' the trade, Columbus has benefited more.
Has Nashville had more team success than Columbus since the trade? Yes, for sure. But they have been better for a wealth of reasons outside this trade. Them having team success doesn't mean every trade they made with a worse team is a win. Colorado could trade Byram and Newhook to Chicago for Max Domi, go on to win another cup, and they'd still be losers of that trade.