First of all, welcome to PNB!
You're going to have a blast.
For your question: The workload...is manageable. xD I mean, we all went through basically the same workload the first term, and it's intense, but doable (aka, we survived). Considering no change from last year, there are readings and assignments each week for XA3, XB3 and XC3, plus in-class quizzes. Hopefully the profs will consider going slightly lighter this year, but...yeah, you'll have to work for those.
The second term is considerably lighter than the first, and seeing as you're looking to have electives in that slot, it shouldn't be too bad at all.