Don't buy an allwave at that size if you intend to do 60 per cent time cruising/flat water - that's my advice. Yes - you can paddle them fine on the flat but you'll asking yourself why on earth did I get a surfing board for flat water

You need an alround shape with less volume.
You are very light so as Skeb says - go for a shape'length that is more suited for what you are after. Not sure what though - you are quite a bit lighter than I am.
I have an 9ft 6 allwave btw - great for surfing but I'd far rather take my longer SUP out for cruising - tracks far better and faster and therefore more fun.