That'd be fine if we were debating why the movie didn't do well, but we're not, we're discussing whether the box office takings would change if the dates were shifted. Nice strawman agruement though, loving it.
Essentially, we've got the typical, "TASM2's box office wouldn't change if the dates were moved because it was so awful" argument. There's plenty more reasons that effect BO takings, and a substantial amount of them aren't related to the quality of the film at all. What if, hypothetically, this film was moved to august, and we had the great cinema depression begin in August? What if TASM2 was moved to before Cap 2, Marvel freaked out, and cancelled the thing? What if movies in August traditionally do worse than movies in May? Or are we saying that TWS was sooooo amazing that it could break all sorts of records for an August screening? Or has no good movie ever been released in august? It seems that, just maybe, the quality of the film isn't the only, definitive, parameter in the BO takings of a film. I mean, statistically (I won't post actual statistics) it's just irrefutable!!
There's plenty more examples of highly rated films doing less than lowely rated films. SM3 did more than SM2, SM1 did more than SM2. Iron Man 3 made more money, but was of a lesser quality than, DoFP. (RT scores). And even with the star wars example and the transformers examples, you dismissed them by bringing up these outside reasons to invalidate them, but that's exactly my point, there's outside factors that effect BO takings, and it's not just "This movie bad, it do bad no matter what".
To bring it back to the original post, it'd be lovely for some to say that TASM2 is doomed in whatever year, whatever time it as brought in, however history shows that whilst the quality of a film is one factor, it isn't definitive in affecting the overall change of box office results.
Fans seem to ride a wave of negativity regarding this movie and franchise, and unfortunately, logic and reason sometimes drowns due to the slight emotional trauma that Dr Kafka and Russian Rhino caused people.