I can see the arguments both ways in regards to Neil's fight class, in reality he's probably somewhere between a middle and heavy. What you say is mostly true but doesn't mention the fact that Orpik was also running around all game with extra slashs and Neil was simply calling him out. Nothing wrong here. Present day Chris Neil reminds me of the latter stages of Tie Domi's career, both begun turning down fights more often towards the end of their careers, and I think they've earned that right. It's not for a lack of bravery or a cause of fear (Every fan base uses that excuse for rival fighters, it's just annoying and dumb), I think it's just age and also strategic, both knew when to drop and not to drop the gloves.
As for MacIntyre, when he's in the NHL he's the #1 fighter in the league. Neil could possibly force a draw vs Mac if he's fortunate and get a few shots in because he's one of the most intelligent fighters in the league, with a solid chin as well. As for this game, I don't think MacIntyre challenged Neil, it was more of a warning to settle down than an actual challenge. Mac had a chance to just initiate a fight when Orpik/Neil were tangled and he just separated the two. It was more of a peacekeeping act. Which sucks for fight fans.