Sit too soft in the new stepway!

Hello, I ordered the new Sandero Stepway… but I also had the opportunity to test the new Sandero Laureate. I noticed the too soft seats. My idea now is to cover the seats with hard foam, to work in a Lordose support and to cover the whole with lambskin covers or to attach the foam to the lambskin. So I hope to improve the comfort of the seats for long distances. However, I could imagine that it effek more active methods gives to improve the hold of the seats and that one of you already has experience with it. I am very grateful for every suggestion in this direction. Greetings Radislaus