What is he is saying is an interesting observation to be able to be perceptive of
The songs are so hallmark that it's hard to think of them as not 2Pac
But a majority if the album was set-up for something else - perhaps a Dre and Ice Cube project
And those songs were given to Tupac for him to do his thing on a plug and play basis
Now there are some songs that are definitively Tupac ... Ambitionz Az a Ridah
I Ain't Mad At Cha, Life Goes On
But others were plug and play and thus, it is a project that Tupac was not thr creative spearhead of