I would like to see perhaps maybe in 6 months or so depending on how much time you have that the mandatory set of tyres rules is implemented maybe if you are in Elite or something. This is so that it can give managers a different feel and it can also make the strategy thinking in managers explode in a good way. I know a lot of people might not want this however it's only a suggestion so oh well.
For those of you who do not know how the mandatory set of tyres in the real world work it is basically that in a race if the inters or wets aren't required, managers need to use at least 2 different slick tyres during the course of the race and this usually applies to the people that qualify in the top 10. This would also prevent the constant abuse of the hard tyres. For example if you start on the mediums, you are required to go on hards and if you start on softs, you have to go on mediums. This is because you are required to go on the next hardest compound. I would also like to say that if this is implied, if you qualify on supers, you have to go on another set of supers and also the next hardest compound which is softs to meet the requirements.