I don't know Rodriguez's game but yes I still want signings from abroad that haven't played in the PL before, because the signings we have made this summer are unsustainable in the long run and why should we be the only team buying solely from other PL teams? Arsenal and Emirates Marketing Project don't do that, neither did Liverpool and those 3 teams have won the last 10 leagues.
We should be buying the best and most suited player no matter where they are sourced from because it's only fear that stops us from identifying great potential outside of the league and bringing them in. If we stuck with the PL only mantra we would have never signed Modric, Son, Berbatov, Dier, Eriksen, Lloris, Kulu, VDVx2 etc, etc, etc. that doesn't even include the non PL British based players we've bought from the championship.
What you're suggesting will just raises our costs across the board constantly and eventually we would run out of the ability to actually compete for the PL signings. Sometimes you do actually need to identify and sign lesser heralded but future greats.