Pretty much... He gained the Ring's recognition when LaPorte won the vacant WBC title after defeating Miranda for the vacant WBC strap because he had already scored a defeat over him in a prior match.
With Sanchez' demise, Pedroza was the best in the division period. It would have been a moot point for him to fight LaPorte for that title. A man he already defeated.
I think Pedroza would have beaten Laporte regardless, but I'm sure Laporte felt differently. Pedroza got away with a ton of fouls in his fight with Laporte.
Yes, I believe low blows had a lot to do with Pedroza's late round charge. But laPorte had evolved into a better fighter & earned a match with Sanchez, which was in negotiations when Sanchez passed away.
The low blows wouldn't shock me, as LaPorte called The Scorpion "The dirtiest fighter I ever fought".