I think CX is usually pretty good about this kind of stuff, but something I learned from experience... if an agent tells you the gate or transit counter (for your rescheduled flight on another airline) is really far away and you need to walk very fast, insist on a buggy even if you're going to have to pay for it. I've missed two rescheduled connections due to this. Ended up overnighting in a hotel on CX's dime.