You don't need the maths and physics but a good understanding of those subject would certainly make your life easier. Search this forum for previous topics and the topics covered in ATPL. If you are taking maths a year early, I would assume that you're reasonably good at it so you shouldn't have a problem.
A lot can happen to the job market in seven years so you could be well placed. The rotary job market tends to operate in 7 year cycles but I can't speak for the airline industry although the two are linked.
Cheers
Whirls