Leonard and Warner are both at over $19M AAV, Mosley is next at $17 (years ago). I don't think Roquan is going to accept less than $19M, even if he comes in slightly below the top 2.
Generally I like the way the Ravens big salaries match with positional value but I'm not sure I love making Inside Linebacker one of the positions where they're spending big.
Sure, but that depends on where they value him at. He may not be valued at those players because he may not be as good as those players.
I personally am not worried about the positional value because, if I'm not paying Roquan, who am I paying? There's rarely any high end pass rushers, Corners or WRs available in FA. They either get kept or traded for picks + money.
If you want quality players at high-valued positions, you either draft them, or you trade draft assets for them and pay them tons of money. They're very hard to come by as straight FA acquisitions.
Not to mention that in the Ravens current roster situation, there's practically nobody else who warrants a large extension in the next few years. We've locked up pretty much everybody we want to, and players playing on rookie deals who are performing, like Oweh, Bateman, etc. are 2-3 years away from needing extensions. Assuming they get one at all.