Nola has been very good this season 98% of the time; people seem to only remember when he stumbles as every pitcher does at times.
At age 31, there are some signs like H/9, HR/9, BB/9 have crept up over the last two seasons and his SO/9 have dropped this season, but he still has an ERA+ of 112 and is nearly a 3 WAR player over 181 IP.