And, if we really want to discuss alien intelligent design, then by all means let's discuss that. I'll start things off:
Where are the aliens, if they are designing the course of terrestrial biology?
If the aliens have been here, why do we see no evidence of alien visitation?
If aliens are directing biological phenomena from interstellar distances, by what process are they doing so?
Where did the aliens originate? Did they evolve, or were they designed by yet more advanced aliens? Where did the initial designer aliens originate?
If the aliens did evolve, then why could we not have evolved just the same as the aliens did?
If the aliens did not evolve, and the initial designer aliens did not evolve, then did God create them?
Oopps! Never mind! We weren't talking about God! Aliens designed us..
And is it turtles all the way down, then?
I still laugh when I remember the classic thread where someone was talking about "Intelligent-Design-which-isn't-about-god-really-we-swear-it", and Right Wing Professor remarked (concerning the bizarre structure of DNA), "If there were a designer, he would have had to have been drunk."
...and then some moron responded with, "Yours was a deliberate, unprovoked and pointless attack on religion which proved nothing except your enmity towards religion."
Gosh, I thought that ID wasn't *about* religion...
I believe you might have over-focused on the suggested solutions to the intelligent designer question to the exclusion of the reason for asking such a question in the first place.
Since the data indicates that randomness is not a probably answer, then the right direction is most likely in some direction other than randomness. That suggests purposefulness and design....thence, intelligent design.
Hypothetically, as if you were concerned with answering the question, What would YOU speculate as the source of the intelligent design?
The problem, of course, is that our experience limits our speculations.