What does Gathering Idols reward?

Gathering Idols gives Thelsamar Axe, Dwarven Flamestick, Trogg Slicer outright.

Where does Gathering Idols start?

It was picked up in Loch Modan.

Its level has not been recorded yet; it shows once a player accepts it with the addon running.

No. The quest exists in Classic Era as well.

World of Warcraft: Forever · quest

A quest in World of Warcraft: Forever in Loch Modan. Recorded by 3 players running the addon.

Level, giver, pay and objectives show once a player with the addon accepts the quest.

Item	Given	Item level	Vendor sell
Thelsamar Axe	outright	18	10s 94c
Dwarven Flamestick	outright	18	8s 21c
Trogg Slicer	outright	18	13s 72c

What does Gathering Idols reward?: Gathering Idols gives Thelsamar Axe, Dwarven Flamestick, Trogg Slicer outright.
Where does Gathering Idols start?: It was picked up in Loch Modan.
What level is Gathering Idols?: Its level has not been recorded yet; it shows once a player accepts it with the addon running.
Is Gathering Idols new in WoW Forever?: No. The quest exists in Classic Era as well.

Source: what players running the addon saw in the quest windows; the quest text itself stays in the game. Every quest seen · Loch Modan