Welcome to the group and the world of home brewing. Your will be moving to all grain before you know it. Enjoy the journey and drink your mistakes, it will make you a better brewer. Have you ever been to the Left Handed Giant in Bristol?
Usually it is not that the kit is out of date. Most of the problems I have found is the water profile is not correct for the type of beer people are trying to make. Just because your water tastes great does not mean it is great for making beer.