Would it be overkill if elemental shaman would get t15 4-set bonus as baseline?

Atm i really like timeframe i get to use ascendance - be it to w8 trinket or some phase change without losing much dps compared to not having set bonus.

Maybe atm it's too early into 5.4 to tell is there changes or not to our damage but without any i feel we fall too much behind.