Regarding the question of efficiency on the part of any "designer" of the universe ...
Efficiency depends upon what the goal is. If you have unlimited resources and unlimited time, there is absolutely nothing to be gained in creating everything instantly and without any process or formulation going on.
To an Engineer for whom every kind of problem was designed in His own head, as well as its solution, the process is the goal. And that is also the case for a true Artist, who unlike most of us, does not need to revel in His own accomplishments, but then seeks only to share both the process and the results in a communion, in a relationship, that He establishes with those He loves and who return His love.
How does this have bearing upon our discussion of a "designer"? The fact is, you cannot throw out the other accepted truths that are a part of someone's model of the world while testing one of them for consistency with yours. If you want to falsify a world view, you have to take it on its own terms, and find a contradiction within that model. So it may be fine for you to suggest that any designer of the universe must be efficient in terms of not wasting any time or material as a potter or sculptor does, but that's because your world view accepts any such designer as primarily person-like in their desire to be efficient with resources. A world view that discounts this presumption about efficiency may also accept the designer as an artist with unlimited resources.
There is no basis to make your assumption, so looking for inefficiency in that regard to disprove ID is likewise baseless.