There's no hit or miss or doubts with regards to how effective giving players a choice can be. So yes, it would still work for Year 5 and up to Year 10 as well. All you are doing is giving people the option, and more options is always preferable to few. As far as new weapons, its stupidly easy to keep coming up with brand new ideas for weapons and I'm actually rather disappointed that they are taking this route. What you have now is a system which already encourages being lazy, because they can essentially tweak or recycle old concepts for weapons and just simply resell them as "new" with a higher max damage stat. Keeping everything that is old relevant going forward advocates a need to get more creative with weapon designs and concepts to expand and create new exciting ideas to interest people.