Most of your points fall if you assume that the only assured Pauline corpus also excludes Ephesians, Colossians, 2 Thessalonians -- not to mention the Lukan Paul in Acts. Apart from some passages in 2 Timothy which do look pauline (but the conclusion of Hebrews also shows a widespread tendency to paulinize an obviously non-pauline writing), in the Pastorals we are very far from Paul's interests, language, and communities.
That the Pastorals are so often referred to from the 2nd century onward is natural because they are in tune with the Great (catholic) church creed and organization. In this context the Pastorals are crystal-clear, while the problematic of Galatians or Romans has become obscure.