It's really difficult to go against Mike building a title team through recruiting, with one or two key transfers. Most of the key contributors were top 50 or top 100 recruits.
Like you said, depth is more important for football and the draft can create holes. Texas had 6 of 8 everyday offensive players (Maloney, Henry, Mia, Reese, Stewie, Goode) recruited to and developed at Texas; I do not recall Mitchell being a highly sought after recruit and we all know KB was not. 3 of 4 pitchers were recruited to and developed at Texas - TK, Cit, Cam. And Mac Morgan was not a rental, she came here as a sophomore and was coached/developed for 3 seasons.
I think the lack of overall portal success outside of the Oregon 4, Joley, Mac, Czech and Dolcini speaks to Mike's belief that the majority of his roster needs to be primarily recruited to Texas and developed by Texas.
And Dolcini was a special case, because Elish screwed us as hard as possible
I would be shocked if Texas picks up more than 2 portal players this year, depending on if Cit leaves or not.