So someone told me last year that the app is indeed much better on tablets.
I followed this guide (roughly)
Now I have the tablet version of the app on the phone and it is indeed much better, now shows int/gap alongside sector times. In addition I can see the race map as well without covering any of the drivers in the list. In all honesty it looks fine on the phone so I dont know why they downgraded the experience on phones anyway although my phone is a S5 so does have a 5inch screen.
Hope this helps others, your phone will need to be rooted.