Should the Elementalist have received the spear as a playable weapon when Weaver was released?

The Weaver is a melee class and his aquatic skills as well. Do you think the spear should be made available to Weaver since we're getting improvements in aquatic combat?

Weaver is not a melee class.Weaver is a specialization that focuses on making use of multiple attunements and swapping them often. It also focus on dueling by being mobile and having barriers and improved hp.The sword is a melee weapon available for weavers.

A staff or scepter weaver is not a melee character and is not less a weaver.There is no need to get spears.

No. Waste of development efforts to design tons of new skills with very little applicability. Will never be relevant in anything other than casual (underwater) PvE which is pretty rare.