There is very little one could do to improve The Westin in Melbourne, certainly from a business hotel standpoint. The rooms are very elegant and tastefully appointed, not to mention quite large. The bathrooms are very modern and luxurious, with rainforest shower heads, excellent toiletries and are so big, you'll need a map to find your way from the sink to the shower. While some travelers have reported noise, I heard none during my stay, although I was located in a rear room, rather than one facing the street.
If I was to be unreasonably picky, I'd say that the only issues would be a cracked light switch, and pillows that were too soft (alhough the latter is personal preference). All in all, a great hotel.