Closer to four years actually. I pitched this on literally my first day at work - Dec 1, 2020. And kept annoying people about how we should do it. Finally they let me build it, probably at least in part to shut me up! :D For me, the main driver is that I'm bad, so my kills/wins/damage stats are ... not very good. So I wanted to be able to link something that wasn't purely skill based - Legend abilities are my personal favorite - but I also wanted the kick ass art. My original idea had more customization on the stats side, which I'd still like to do eventually, but it's a much tougher nut to crack on the UIUX side than this.
Glad you like it. And as for the suggestion, well, I think there's no real ownership of obviously good ideas!