I am all for making race strategy as important as possible. One of the things that make strategy so simple is the unrealistically short pit stop deltas.
Pit stop deltas are on average around 16 seconds, when in F1 they are normally 20-22 seconds. Having to account for this extra time when deciding how many stops I need would bring a real difference to this game.
Currently, I don’t think anyone EVER runs medium and hard tires. With the time disparity between them and softs, and with you only needing a 16 sec gap to afford an extra stop, it makes softs a no-brainer.
Introduce a longer pit stop delta and you’ll expand the strategies managers are able to employ.