Im sure it wont make too much of an impact on Commander as it doesnt do anything when it hits the board, but those EDH players do love drawing cards, so itll probably hold at least some value
Yes, its powerful as hell giving you resilience against aggressive decks, card advantage that control decks are after, and a win condition all in one and it scales all game long
The spells you cast using Access Maze's ability have an alternative cost that's paying life equal to their mana value
The ability to pay mana and ping each opponent isn't incredibly powerful, but it is a way to keep things rolling in decks such as Rakdos, Lord of Riots or the more recent Ob Nixilis, Captive Kingpin without having to have spells or other nonland permanents around to help generate life loss
The heavy overlap here can be partially attributed to a mostly shared theme