Symmetra's Ultimate is the most underwhelming in the game and I always find it either getting destroyed before it gets its use or my team just never dies and it just rots. It should have a 30 second charge and each charge grants its the ability to teleport one extra person until it fully charges at six. When you choose to place it is basically up to you and it'll cool down and begin charging once its used up or destroyed.
I like the idea of her getting an area of effect Ult like the one video mentioned. It'd be even better if inside of it provides healing for the team and would cancel enemy ultimates. It'd make her much more viable to be picked on any map because as of now she's the only hero who is situational and even then it's only for half the game.
I've been playing Symmetra heavily this whole month and she's become one of my favorite characters to use, and it sucks feeling like you need to switch her out because she can't provide much for her team after a certain objective
) but it frustrates me how situational she is. She's literally useless on attack, it's so sad bc I have the most fun with her & only get to play her less than 50% of the time.