Why change poppy into something she is not?

I currently main poppy, played her since season one, and am loving her in this current meta. I believe that she shouldn't receive a heavy rework because her kit is already super unique. I mean people don't play poppy because yes, there are better champs out there, and honestly, it takes time and talent to get good with her. I can understand Sion's changes because... well he didn't have the funnest kit to begin with. But even in his case my final point stands. Poppy is a blast to play as she is. I feel like they are taking out the best parts (her q, passive, and ult) all of which made poppy so unique! Her ult really isn't much better than kayle's or trynn's ult (trynn can use his while cc'd poppy cannot) but it is so much fun to use it in fights and be able to block so much damage for your team and take out key targets, but guess what! now you are in the middle of the team without that ult! Honestly she isn't op, she has just been forgotten. They shouldn't recreate her just to remind people she is there.

Look at amumu- they did a special art movie for him and BAM people were playing him again. Rammus- still op, never seen. Nasus, more op than poppy late game but not played anymore. if the problem was that people weren't playing poppy much maybe it's only because the newer champs are flashier. A visual update for poppy would fix that, but change her kit and well... you are just killing a champ in an attempt to make people care about her while hurting the trust of all those that already did.

My point is this... why do you want to change poppy into something she is not? Why not make a new champ that is what you are thinking about and leave poppy in the game?