"Only blind people would think he had properly manifested a resignation."
No offence, but the same can be said for those who see Benedict still as the current Pope.
If Benedict was (as you claim) continuing to act and function as Pope, we would not be having this discussion. Francis wouldn't even be in the picture. It's really as simple as that.
Very recently Benedict declared his "filial obedience" to Pope Francis. The functioning head of The Church is not "obedient" to a subordinate. Those are not the words of a man who sees himself as the reigning Pope. Likewise, Benedict is letting Francis do everything Francis is doing, unimpeded. That is not the behavior of a man who is acting or functioning as Pope, either.
I get the impression you're reading what you'd like to in what Benedict does or doesn't say. There is no proof of a deliberate omission any more than a deliberately qualified resignation. I know, you're going to repeat that "the papal ministry is not the papal office" and I'm going to repeat that Benedict resigned his ministry "in such a way" that the jurisdictional authority of being Pope and Bishop of Rome is vacant.
You see Benedict's resignation as "qualifed"... "A" but not "B". Benedict's own choice of words show that he renounced "A" in such a way a new Pope must be elected. If "such a way" requires "B" then it has to be included or it falls short of the standard Benedict established. Simply put, a new Pope wouldn't need to be elected at all and that is what Benedict explicitly stated he wanted to see.
If a claim is made that an omission is deliberate, what then of Benedict's adoption of the title Emeritus? That is undisputably a deliberate choice on his part and an Emeritus is one who formerly held an office and (more importantly) doesn't anymore. Using your line of reasoning, Benedict's deliberate choice of title shows his intention to resign the office. An "Emeritus" has nothing to do with just resigning one's ministry and retaining office. .The title he chose, by definition, applies specifically to someone who retired from office.
Personally, I find it much easier to accept the straight-forward reasoning that a.) Benedict resigned. b.) Francis was appointed. c.) Francis is the worst Pope ever. and d.) everything happens because either 1.) God causes it to happen or 2.) God allows it to happen through the action of others. As Christians, we accept and acknowledge the Book Of Revelations as a true prophecy of the future.
There is no point in trying to second-guess the Almighty's plans than there is constructing elaborate arguments to contradict what is, sadly, a grim self-evident reality and the harbinger of worse things to come.