If anything they should give up on OH/IA and focus more on the sunbelt of NC/AZ where they performed better, particularly in AZ where the election was closer than NC with a fraction of the capital investment.
In 2024 sure, but in 2020 they should focus on 270. The reason Trump dropped so much in Arizona was due to the white vote - something he could pick back up in 2020.
Exactly. Trump did better with Hispanics than Romney. If Trump could get Romney's white vote share, it would've been a 10 point victory at least. While I do believe Arizona will go more in New Mexico's direction over time, the GOP will still have an advantage in the near future.
Giving up on Ohio and Iowa is a big deal. It also means that PA, MI, WI, and MN are proabably competitive too, and winning Arizona and NC wouldn't be able to offset that.