A word of warning. Going from a 15 race season to a 22 race season means that any newcomers joining your Elite tier are going to begin next season with 50dp in all attributes except CD weakness which will be 28. There will also be similar performance advantages for anyone joining one of the other tiers.
If you want to avoid this imbalance (a newcomer will be untouchable for the first few races) I suggest every one of you leaves and then re-joins your league after the France race finishes on Friday so that your cars will reset based on the 22 race calendar for next season and not the 15 races of the current season.