When I was lvl 3 I got a Gozen-C (pretty sure that's what it's called) sniper. It was amazing. It was practically my primary then. I one shot anything red and 3 shot the majors. I loved it and never wanted to let it go. Then one day I leveled up and moved on to a further part in the story. Sadly my lvl 3 sniper was a thing of the past and all I wanted to do was get the new weapons. It was a great sniper and I loved dominating pve with it but it was no longer relevant and it was time to move on. Year one was awesome with some really fun guns that were very rewarding to use. But it's time for us to look to the future and new gear and new content! Personally I would love to use Gally to burn bosses in TTK. However, I DID THAT ALL YEAR 1! I ground for it. I used it. I'm ok with moving on. TL;DR-you got to use year 1 gear (well the stuff RNG blessed you with) for a year. Time to get some new stuff.