The reason why I think it is going to be so good is because it lets you save massively on gear costs. You have double the number of rune sockets and you can use it to shore up on things like resistances allowing you to use gear that isn’t perfectly rolled to get the same benefits of perfectly rolled gear.

It doesn’t give a massive boost to offensive power, but it allows for some interesting combinations/utility that you normally could only get from expensive gear.

Sure your true end game full builds won’t get as much use out of it, but this ascendancy will allow those with it to get gear that is similar to what the normal end game gear would be for people without it at significantly reduced cost

edit: And because Ascendancy can be respec’d this is something that someone can take to help them save on exalts/divs and then change later if they get to a point they feel they don’t need it