Each champion has their own skill tree as well as each sovereign.
That part I like and want to see kept.
My issue is that the way it's implemented now seems less "fun" than LH for some reason. I suspect it's a combo of a lack of epic loot and not enough passives that help to buff a character up.
I also think if you do an LH sequel, that having champions/sovereigns have their own tree there will be necessary as well.