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.
We have our first look at the FIFA 20 gameplay, but it's not a super deep-dive. If you want all the FUT information and if you want to see more in-depth gameplay that will let you understand the features and see how well the improvements look and feel, you will need to keep waiting.
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.