It's not just North Carolina. The new GOP strategy is "We can't win with how it's always been done, so let's change the rules".
From CBS News:
Republicans seek to change how electoral votes are allocated
yeah the voter ID stuff is getting to be old hat at this point. the electoral map is looking dire for republicans thanks to demographic shifts so the smart move would be to try to gerrymander the electoral college by ramming proportional allocation through in strategically important states in which they don't have a chance in hell of winning the popular vote.
all told i'd actually be in favor of proportional allocation if every single state adopted it because that would mean the GOP would have to straight up win the popular vote in hundreds of districts across the united states. democrats would be able to scoop up electoral votes all over the south and midwest.
i mean there's a reason why you're not seeing that proposed in texas