Low Diamond/High Plat Lucio - Need Help

Hey all, I'm currently a diamond 5 lucio who just got back into playing overwatch. I climbed up to diamond fairly easily, but have plateaued hard and can't get up to diamond 4 and above. In my gameplay, I think my amp usage is good but could be better with less panic amps, but I think the main thing holding me back from higher ranks is my positioning. I get caught out and die a lot in this replay, and I'm wondering what I can do/ where I can position to have impacts on fights without dying. Thanks for the feedback if you end up watching!

Code: H1AX98