I am on SQ 308 too.
However even though I would love to try the new Suites, given a choice of this "all day" flight over the the "all night" SQ322 I would still stick with the 308 as I chose it so that I can maximise the benefit of being in First Class. Getting on the 322 it is very late and if flying from Oz one will be tired, not really needing to eat only really leaving breakfast when you wake up. On the 309 as it leaves at 9am (11am MELB time) I will order the right dishes to make the breakfast a lunch, and then have the lunch as dinner later. This gives me the full flight to enjoy all the F perks including the two nice meals, the Krug, full wine list, service etc as well as use of the Private Room (I will use that for dinner when I arrive the day prior and for breakfast on my day of departure from SIN.
Fortunately this time I am not rushed for time going over and so have chosen to maximise my in-flight experience over quicker arrival time.
Hopefully my Suite back will get changed to a new Suite ...but alas that is from FRA in July and I have seen no rumours on the new Suites flying on that route yet