I prefer the flexibility of pillar 3a, especially now that VIAC and co. are available. Pillar 2 pension funds definitely also have their advantages, though, especially if you want the safety of a yearly income no matter how long you live. However, there is a risk of changes in regulations. E.g. lump sum withdrawal of your money may be restricted in the future.
You can open a VIAC vested benefits account and transfer that money there.