I like the way Daniel has done it and its always been random and a unkown for us which makes it extra exciting. I think we had 1 wet q and 1 part wet race last season so wasnt to bad in trying to be like a average f1 season remembering we are only 10 races.
How about a scenario which perhaps can increase or decrease chances of wet race depending on what previous race was ? Say Daniel makes 15 files to pick from each race Randomly, with 2 wet/partial wet and 13 dry in the pick to start with.
Race 1 is dry then he adds a wet file to the random pick so 12 vs 3 Race 2 dry the 11 vs 4 and so on etc but also if for example Race 1 was wet it would be 14 vs 1 for next race 2 so it doesnt get crazy and end up last 5 races all wet etc.
You can see it this way if 1st 3 dry we would be close to 50% chance of wet file being picked by then, it may still end up being dry for every race to this way to but i think with chance increasing as we went it would more than likely be atleast 2 wet/partial wet races.
We could also make it even easier we could just use previous f1 race for the weather we will have, but then we lose the randomness which i enjoy. Sometimes last season i was hearing thunder when there was actually no sound at all at Interlagos, just Daniel playing mind games with my brain
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Overall though i would like to leave it same as Daniel has done as we wouldnt like a unrealistic scenario where we had more than 4 races wet ?which we could have by increasing chances even by a little, i think that would just seem wrong and as we had a couple wet or partial wet sessions last season a little less than people would want but it is quite realistic compared to real life f1.