A few things to consider:
Most prepared coleslaw mixtures contain carrots and sometimes red cabbage and are usually in 16 oz bags. If this is what is available, I use only one bag because I find 32 oz. to be more than I like. Sometimes (at WalMart) I can find 10 oz bags of coleslaw mix that is 100% shredded cabbage which I actually prefer. When I can find this type of coleslaw, I use two (10 oz) bags and it's perfect. 10 oz seems to be too little on its own and 32 oz too much so I adjust what I use depending on availability.
On the spices, if you prefer, you can substitute all of the rosemary for thyme, depending on what you have on hand and also according to your taste preferences. I make it both ways, depending on what is stocked in my cupboard and what mood I'm in when I prepare the dish and actually like it both ways.