Hey Colin,
I find the antiseptic dry spray is very useful.
You could probably get away without the eye pad. you can always improvise using other dressings. Space saving is quite important when you try fitting it all in. on that note, the shears for clothing would do for cutting bandages, plasters etc, so you probably wouldn't need a scissors as well.
Rather than carrying a syringe, I throw in a few of the little plastic bottles of sterile water. They're great for irrigating wounds and come with a ready/sterile water supply.
Hope the comments are of use