With the recent changes to her and several of her counters, her play style has shifted from one that could be played at pretty decent distance and controlling a choke to more of a rush down, get in, kill at target, get out play style. Now with her mobility upped (conc being on a 9 second cool down instead of 13 or w/e) you can use it to shoot yourself over to a target quickly, land some directs and hopefully boost away before you're focused. So practice with the different ways that it moves you. They also made rocket jumps more viable with her so figuring out how use it as an air escape when jj is on CD is also useful. When dueling a dps that's good against her, if you can't rush them, then you'll need to play around cover and pop shots from varying heights. Also you're a sitting duck while using your ult, so since you'll die often when using it anyways, don't be afraid to solo ult a support and make sure that it's at least a good trade.