They both have trade value. Nieto as one of the better PK guys in the conference and speed and Gambrell is a 4c on a good contract with upside. Not a very intelligent comment.
It is my strong belief that management absolutely rushed Gambrell and screwed up his potential. He is a skilled forward. He is not good in a bottom 6 role where San Jose has repeatedly played him. Problem is he has not played very well when playing in the top six either, despite always looking very solid in that role in the AHL.
I have always been a Nieto fan and was very disappointed when he was waived and claimed by Colorado. (Hell, he was on my Seattle expansion board as who to pick, but I never envisioned him as a trade chip or longterm player for the team, it was just that the sharks exposed nothing of tradable value and there is no "pass" option).
I honestly root for both guys to succeed, but I am not delusional about their trade value. They have next to none.
Do not confuse usefulness with value. Nieto is a useful energy guy, but he is easily replaced, and he isn't really strong enough in his role at even-strength to be desirable for a contending team. Rebuilding teams would mostly rather give those minutes to younger players to develop them, so while useful, not really many teams would be willing to trade any draft capital to acquire him during the offseason. He may have a bit of value during the season as an injury replacement/temp solution for a contending team, but Seattle was never going to keep him as one of their top 14 guys.
I was in San Jose at the time of the Shark's inception and I have bought partial and even full season tickets for the club a few times during their existence. They are a team that I follow more than casually, so my comments aren't completely uninformed.
You are obviously entitled to your opinion, but it would seem Francis and the front office agree with me and viewed both players as unlikely to have trade value, otherwise at their cap hits, they would have been flipped the way Tyler Pitlick was.