Wait for More FIFA 20 information
Right now we know about the new Volta mode and we've heard about how EA is changing the gameplay with some new features that could change up the game.
That said, we still haven't seen FIFA 20 gameplay that shows us what these new features look like and how they actually handle.
We won't see this for at least a few weeks as EA will likely draw out the new features and tease additional upgrades as we move closer to the release date.
If you want to make an informed decision, it is a good idea to wait for more details before you pre-order FIFA 20 -- especially digitally since you cannot cancel pre-orders easily.