Moon, putting Porcello in the same tier of very good & HOF pitchers in terms of WAR (for instance) doesn't make sense at all, reason why your analysis is flawed and out of context to start off.
FG & BR built several levels with different thresholds in every stat in order to differentiate pedigrees. In almost every stat based on those charts, he ranks between average and below average in his career. Both sources can't be wrong of what they see in Porcello.
Said that, sure, you can do all the the analysis you want and believe whatever you want, but your arguments are way different of what 2 of the most respectable baseball sources see in Porcello (Between Average and Below Average)—based on their charts.