For your new contemporary pop styles to be authentic, I suggest you get input from people for whom this kind of songwriting and production is their first language. The reason BIAB realtracks are so good is that they are performed by musicians who are native speakers on their instrument and genre. Having sampled the existing 'modern pop' styles, I would respectfully and gently suggest that contemporary chart pop has been rather like a foreign language to PG up to now!
If PG staff would like to familiarise themselves with the techniques of deconstructing hit pop songs and recreating them (reverse engineering), may I recommend the Make Pop Music free channel on Youtube?
These tutorials are by Austin Hull, who is very busy producing other people's pop songs as well as his own. He is very generous in passing on his expertise in producing different pop genres. Some of his tutorials come with free stems that you can download to produce yourself. They also give a good idea of the elements needed to make a production ready to submit within the music industry.
Here are a few of his tutorials to get you started. There are many more on his channel.
How To Produce A Pop Song In 10 Steps
https://www.youtube.com/watch?v=k4YixkCxZk8How to analyze and deconstruct pop songs
https://www.youtube.com/watch?v=Z40mY1JC2FIHow to Make an Ariana Grande Song
https://www.youtube.com/watch?v=RtxwsA1iAnYHow To Make A Pop Ballad
https://www.youtube.com/watch?v=irjUUwUM70QHow To Make A Mellow Pop Song
https://www.youtube.com/watch?v=hr6vf6t3kxYHow to Make a Taylor Swift Song
https://www.youtube.com/watch?v=7_cmSbb3gC4How To Make A Song Like The Weeknd (Blinding Lights, In Your Eyes, Faith)
https://www.youtube.com/watch?v=H2d3y58rSYU&t=550sHow To Make Funk / Disco Pop (Charlie Puth, Dua Lipa, DNCE, Doja Cat)
https://www.youtube.com/watch?v=NI4rzNsTv_oHow To Make A Trap Pop Song (blackbear, Post Malone, The Weeknd) + FREE STEMS
https://www.youtube.com/watch?v=9fHPVQnX8EwI hope these links might also be of interest to other BIAB songwriter users.
Also on Youtube, you can find Billie Eilish's brother talking about how he produces Billie's songs and people like Charlie Puth demonstrating how he wrote and arranged some of his songs. (His song River was on my list).
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