Keep in mind, I understand simplicity is important. But let’s go over your suggestions.
If Echo heals with her beam, she could drain shields around her decently and heal more accordingly.
And I really don’t think she should get an extra life when ulting. But she should get 1 use of copied ult, because in order to copy, she needs to use her ult. Maybe allowing her to use an enemy’s ult, if her enemy uses it first. But the game would be better if simple. So adjusting how quickly Echo gets her ult charged, would cause her to copy an ult about every time her opponents ults.
Mmmm. Charging her bombs. If her bombs do a little less damage, it would be better if she doesn’t charge, because she often needs to fly when launching her bombs. Flying and aiming would be harder. I don’t think she should charge her bombs. Another reason I argue, is because I would love to surprise opponents, and have a good shot at taking out key targets (other supports or snipers in the back line).
But displacement is ok because that would give her more utility. Maybe she could displace opponents from position, like Lucio.