So with the first 2 ships being named after the sitting President's home province. Does this mean the follow-up ships will follow the same practice?
This practice didn't actually start with the SSVs.
During Estrada's time, one of the Tenix ships was named the BRP San Juan.
When he was overthrown by Edsa 2, another Tenix ship was named BRP Edsa Dos
To BRP Tarlac and BRP Davao del Sur are merely a continuation of a practice that's been going on since the turn of the century.