Suggested

Commit to engine, fuel & tyres

Surely just as in real F1 you should have to commit to engine, fuel & tyres at start of season. I'm sure some of my competitors are changing these on a race by race basis and this can't be right can it? Or have I got this wrong?

I'd be happy, at the very least, if you were forced-to/highly-encouraged-not-too change engine suppliers in between restocks or else pay a higher fee or some other small penalty for switching in between.  It does baffle me that you sign on sponsors for 10 races at a time, but are free to switch suppliers whenever you want to.

Yeap, couldn't agree more. If they want to allow a fuel or tire change, then have different types of Fuel & Tires. Not different Constructors. At the least have a penalty for keep changing & cheaper if you run the same Constructor for multiple races.