I'm slightly surprised that having literally just moved in she's off to Mexico- not entirely sure it's worth buying a flat in London to use about six days a year but whatever, that's up to her.
But, about the upcoming Mexico tours. When I travel, it's because I want to go to new places and see new things. How many times can you roadtrip across Mexico, diving in cenotes and drinking on the beach at sunset and eating tacos before you (and in this case, your viewers) get bored with it? She's already done two lots of back-to-back tours to Pakistan, hasn't she, and is repeating them again this summer. She's done the Thailand diving trip at least twice and I bet it reappears next year. I know they're just excuses to hang out in the sun and drink and make a load of money from adoring fans but doesn't she get bored doing the same trips over and over again?