There's no anti-Sanchez bias here. A lot of people, myself included, completely wrote Estrada off because of 'advanced stats'. We weren't looking deep enough, and were wrong. Sanchez was a bad starter until 2016, then improved and now looks like a good starter. People are acknowledging that he's become a good starter.
Recap:
Estrada - people were wrong and admit it
Sanchez - has improved, and people now acknowledge that he's good, reflecting that improvement
Not sure what more you want.