Subscribing to and using data from are a totally different fish from using that information as your be all and end all bible of all things football
And as stated in my original post the data PFF gives needs proper interpretation not just blind adherence to total grades
The two players you single out are average players but play at positions where PFF would probably say being average ( as opposed to at rock bottom) would be significant upgrades for the teams mentioned ..getting a top 5 QB or LT out side of a blue chip draft pick that pans out is pretty hard so upgrading to average is money well spent for a lot of teams