Some recent searching on my part came across an actual solution to this puzzle. It turns out that the key to this puzzle was the release date of Fez, 4/13/2012.

If this date is turned into a string of numbers and rearranged using the page order from the tome (15263748), the resulting string is 4011322. This number is then converted into Fez numbers and those fez numbers converted into directions by interpreting the dash in the number as part of the T tetromino (Up, Jump, Right, Right, Left, Down, Down). Rights and Lefts are then turned into RTs and LTs since Rights and Lefts would cause Fez to move off the magic location. If the pattern of arrows on the map is completed, it would imply that this sequence should be read bottom-up, resulting in a final solution of Down, Down, LT, RT, RT, Jump, Up.

Sources: http://www.gamefaqs.com/boards/945079-fez/66768672, image1, image2

A redditor recently solved this here. It turns out that the key to this puzzle was the release date of Fez, 4/13/2012.

If this date is turned into a string of numbers and rearranged using the page order from the tome (15263748), the resulting string is 4011322. This number is then converted into Fez numbers and those fez numbers converted into directions by interpreting the dash in the number as part of the T tetromino (Up, Jump, Right, Right, Left, Down, Down).

Rights and Lefts are then turned into RTs and LTs since Rights and Lefts would cause Fez to move off the magic location. If the pattern of arrows on the map is completed, it would imply that this sequence should be read bottom-up, resulting in a final solution of Down, Down, LT, RT, RT, Jump, Up.