Hi,
I got onboarded to the PIONEER Program last month, here's what I had gathered from the Bank.
You can upgrade, provided you are maintaining the Required AQB for Pioneer (10L CASA or 30L NRV) for a Quarter atleast, then you can be upgraded mostly.
I tried to upgrade with 28.5L Family NRV and my request was rejected.
Otherwise, the easier way is to open a fresh account in PIONEER Directly with a 10L IP and then club all your family accounts, this is the easiest way right now.
Hope this helps.