NLHE, right? If it's LHE or PLO, the responses will be different.
2:1 is a bad ratio unless you're extremely confident in your ability to outplay people postflop and have a high VPIP. 19/16 is fairly standard TAG profile for microstakes.
The reason you end up with a lower PFR than VPIP is that we're choosing to call openers in position - i.e., a tight UTG opens 4x bb, we're on BTN with a hand that plays well against openers tight range, and do not want to 3bet. If you have a 1:1 ratio, it means you're never taking the opportunity to play implied odds
hands in position. This isn't limping, it's overcalling, but adds to VPIP without adding to PFR.
imo, never limping/overlimping at micro, with a TAG profile like yours, makes a lot of sense.