As far as I can tell the following changes are now in effect for all tickets booked from now. Changes are for the 14 day ticket.
There are now 3 seasons - value, regular and peak. You specify your start date from a calendar which is colour coded to the seasons.
The value 14 day ticket is about the same cost as the old 14 day ticket.
The regular season 14 day ticket adds £20 to the cost.
The peak season 14 day ticket adds £80 to the cost.
14 day tickets are now valid any 14 days over an 18 day period.
Genie+ can be added for length of ticket for £6.99 per day. Just under £100 per 14 day ticket.
This appears to mean that if you plan to use Genie+ for 9 or more days, it is worth adding it in advance, compared with adding it day by day. Using £12 per day as the cost of adding it day by day. (8 days x £12 = £96).
If you read my earlier conundrum post a couple of weeks back, this means that not buying tickets for next year’s Christmas trip has added £320 ($400) to the cost of the tickets.