The only part that could cause issues is what they've already identified as an issue:
If you wish to disable cross-play altogether, you can disable cross platform play in the settings menu. Doing so will only put you into matches with other users on the same platform, who have also disabled cross platform play. This has a high chance of making your queue times very very long...
Assuming there's no huge advantage between PS4 and XBOX, I kind of wish they just left out the option of turning off cross-play.