IMO from an Offensive Line Perspective, you are looking for guys that showcase they belong and the stage is not that big for them. Granted the Rams did not have one starter in this game, but these guys are major depth guys and with Neary showcasing the most, let's hope they will get better with more preseason games under their belt because they just played the worst defensive line they are going to see all preseason.
Den I think when you're a rookie in your first NFL game and when your coach is moving you all over the joint on every series, well, it ain't gonna be perfect. I'm also not worried about the false starts, as that typically happens more often when a player is trying too hard, thrown into a situation he's not sure about, or outmatched etc. Raiders had some really good linemen in that game too, btw, well into it, like Westbrooks for example who is more than capable of giving a rook a whoopin.
So for me I partition the rooks a bit separately from the other depth guys. After rewatching quite a bit of that game wrt the rooks I think both did a good job of knowing the scheme (they seemed to consistently know their assignments), and where they struggled were the areas Kromer is going to work them.
Evans for example specifically struggled with speed rush, where the edge would just run around him, so that kick slide of his will be something they work and for now he'll probably end up as a primary OG type. He looked pretty solid in run action, didn't dominate but also didn't whiff on blocks or get trucked. Edwards was more comfortable on the edge, so I can see why they said he was ahead thus far. He did some good things in both run and pass and for that reason I think he is going to factor in as primary depth for us this season.
The veteran depth OL are where there is much more concern.
And since you mentioned Demby he struggled a bit and it seemed he was uncomfortable on the edge. How that affects his standing on the OL depth chart as far as whether he's the swing guy, it's still too early to tell. I think he took a hit last night. And btw I don't care about the Center mistakes, as he's not going to be anything other than emergency option there if he makes the roster. The concern with him is his lack of push at OG where he is in competition to be the first guy off the bench.
At this point it looks to me like Edwards has a chance to be what Boom was last season... First OL off the bench. But I don't want to get all crazy from one game when there are 3x more for these guys to settle in.