I just don't see the Ravens telling Lamar that he's not even worth the higher tag. If he gets non-exclusively tagged, I think it creates all sorts of problems for that negotiation process.
Lamar won't do literally anything in the offseason for $31M a year. $45M is at least close to market value. Not much to complain about in terms of compensation at that level.
At $31M, he's somehow still massively underpaid on the franchise tag.
And trust me, there's very few people more interested in what the market actually thinks of Lamar's value than I am, so the non-exclusive tag would make the next few weeks super enticing.
Another aspect I'd like to see is how long it takes. Theoretically, Lamar's offer could get better after the draft if a team or two completely whiffs on what they wanted. But I'd also suspect the Ravens would want this wrapped up before the draft.