Training mode could use a massive overhaul, right now it exists just to teach you the basics and the only reason I can think they choose Lifeline is for her passive and harmless ult. they need to add all the attachments and let us skip Bloodhound if we want to.
There also needs to be a place that you can see the legendary gear and their passives, I'm still sour about a loss I had as a newbie when I didn't know what a gold shield does, last man standing and I downed both the remaining enemy players and started throwing grenades in a panic assuming another player was alive before getting hit by my own grenades and dying all while looking at the other low level guy hiding behind a gold knockdown shield lol