Yes - lots of depreciation on brand new. Low maintenance on brand new too. Westmead is in high demand by the Indian population.
No - you are paying the developer his profit margin and are likely to have low / no CG for the first few years of your investment. What are the strata fees like?
Maybe - OTP works well in a rising environment, which we are clearly in. BUT there are many risks. Do a search on OTP for some horror stories + some good stories.