I think we fans (me included) are a bit bi-polar when it comes to players and how they are treated.
Last year, when TT was struggling, there were a number of posters saying that Rod "demoting" him and not giving him first PP unit time was hurting his confidence and unfair to TT and making it worse.
This year, many of us are saying he should demote Necas because he's struggling right now.
I don't claim to know the right answer and certainly don't think RBA is perfect, but there's more to it than just how we fans see a player performing at a moment.
I remember a few years ago, a bunch of us questioned why Mrazek was kept in a particular game when he gave up a bunch of goals early. Canes came back and won it and there was a story later where the players came up to Mrazek at break and said "our fault, we got your back" (paraphrasing).
Point being, every player is different and their psyche is different. Coaches have to account for that. If I was coach, I'd try to build a young players confidence right now (Necas or Svech who are stuggling) as we will need them more in the playoffs. Not an easy call though. People forget that Necas and Svech carried us early last season when others struggled.