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Once captured, could the altars provide a slightly larger area of sight over the area that they are in? (Perhaps large enough to have sight of the wolves and golems?)
Also, I'd argue that the inward side should not obstruct vision. You're currently too blind while standing on it for a map with so little means to grant sight. Champs like Jarvan and Shaco have so much of an advantage here as they can see for 270 degrees while everyone else can only see up and down to the lanes.