Is the poem sufficient?
Justin said solve the poem in its entirety, and you will be retrieving not searching for the treasure. I used to think you could solve the poem without many external clues, but now I am doubting that. I think you need them to help explain its structure.
Let's start with what he said about solving the poem, and then add the external clues he has given us for sure.
Justin was asked about different ways to approach the poem. He said "There is a super brute-force way - but that would be very, very difficult." I interpreted it as a searcher iterating through the poem at every possible starting location to find the treasure. Statistically this is almost impossible, but eventually they would solve it when they used the correct location. Or would they?
He later said:
"Something will need to be manipulated to see the treasure".
The treasure is buried/covered. The searcher would solve the poem, get to the double arc, and find the treasure is not there out in the open. We could all assume the searcher would search/dig around, but does the poem let them know that for sure? "Wisdom waits in shadowed sight". Did he name the treasure "Wisdom", and "in shadowed sight" tells you that it is buried/covered? Maybe.
Now let's add the tech clue: "The key to one direction lies in another".
There have been many theories discussed what this means, but I think we all can agree one part of the poem is to be used in conjunction with another. The poem doesn't convey this. You wouldn't know this without Justin giving us this clue. Justin also said the tech clue is not a "core part of the poem", but if you have to combine two parts of the poem to get the correct direction how could it not be?
Now let's add:
Q: "Is there a significant clue visible if the treasure seeker is standing 15 feet away from where the treasure container is buried or hidden?"
A: Tricky wording again. Boy...the most accurate answer is...no"
He paused here. He could be playing semantics with the words "significant clue". I would argue "any clue" from the poem is a "significant clue" if it let's you know where the container is.
Let's take what he said at face value. The searcher solved the poem, and got to the double arcs. They know the treasure is buried, and search around to find nothing. Is there anything in the poem that would suggest the treasure is not at the double arcs, but some distance away? The poem doesn't convey this either. You wouldn't know this without Justin giving us this clue as well.
All this to say, you will need more external clues to solve the poem than just to find the correct starting location. Even when you do solve the poem to get to the double arcs you are still searching not retrieving in my opinion.
There is also a difference between external clues that give hints to the clues in the poem versus clues that aren't in the poem at all. Now you are searching the book and G&G for clues that you might not know their meaning unless you are standing at the double arcs. When everything is a clue nothing is a clue.
I think it was Matt who told Justin to make it as hard as you can because you can always make it easier later. This poem is obviously harder than Fenn's, and that took 10 years. We also assume Fenn's final clue stated where the treasure was. We know Justin's does not. Guess we'll see which one lasts longer.