some 1.15 update that i find out quite interesting or fun:
-new cars:Roadster Shop Rampage /Toyota GR010 HYBRID ‘21/SUZUKI Vision Gran Turismo
-new cafe menu(40-42)/can claim Birthday Present Tickets a week before and after
-new event in sport mode(lap time event)
-there is top 10 star now in license test/mission/world circuit while in daily race ranking you can view more than top10star and your own ranking as well
-DR in My page show an indicator how far you are to the next DR rank
-no more tomahawk PP glitch(mayb will have new setting again

)
-not sure for what reason they remove the following mission ranking record:
-Moby Dick
- Pit In or Stay Out 1
-The Human Comedy
- Kyoto Driving Park One Hour
- Deep Forest Raceway One Hour
- Alsace One Hour
-PD said they have improved on the penalty system..no penalty for minor contacts..not sure if i get bang out track..i still get penalty anot..
more detail can refer here :
GT7 1.15 udpates