Interesting to start with a hilly stage - that might well cause some people to go over category! In previous years the stages with big climbs always came in after the "four race rule" had already taken effect, so riders right on the cusp at the top of their category could sandbag the flat stages and still continue to the end of the season. We'll see if that makes a difference this time round.
In previous seasons they have done either shorter stages (custom finish lines) or fewer laps for C & D in some rounds. I would guess that for us Round 2 might only be two laps, Round 4 will be four or five laps, and Round 6 will finish either at 31.5km (Fuego Flats reverse banner) or 39km (top of Titans Grove).