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Is this something new since NL came into popularity?

To a mostly-limit player, a straddle has a VERY similar effect to raise on one's preflop decision: a big change in the price you pay to see the flop, a moderately small change in the size of the ultimate pot.

If I were in a pedantic mood, I would be inclined to argue that doubling the price of anything is a pretty darn gross change. Yeah, sounds silly in the context of $2 changing to $4. But it's really the relative sizes of the two bets, and their effect on the pot odds, that matters. I wonder if a rule in parallel to the one about whether an all-in raise reopens the action, at more vs less than half the size of the previous raise, might be useful here - a misunderstanding of more than 50% of bet size is gross, of less isn't?

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Doubling the price of something is a large change, but there was no raise to overlook. A straddle is another blind that has been posted. In limit it is treated a little differently than NL, but it still isn't a raise. In limit there isn't' really any provision for a gross misunderstanding of the action other than no noticing a raise. You can never claim you didn't realize they bet so much in limit.