Absolutely. And just to continue where I was rudely interrupted yesterday by the need to work (how dare they!Paralus wrote:Regardless of how Philip is discussed (or not) today, the fact remains that he had histories written of him before his son developed pubic hairs.
Also, as Marcus has mentioned, the phalanx - the "rank and file" - had a very large soft spot for the father. Philip had, after all, made them what they were: citizens of the most powerful state in Europe. It is this "reflection" of Philip that powers the "rebellions" both at Opis and Babylon. Philip was remembered as the Macedonian king and it was his son - mentally deficient or not - that would be their king rather than a mongrel Macedonian / Asian yet to be born.
As Antigenes' messenger reminded the younger Macedonian drafts from the homeland at Gabiene:
The Argyraspides certainly remembered Philip."Wicked men, are you sinning against your fathers, who conquered the whole world under Philip and Alexander?" and added that in a little while they would see that these veterans were worthy both of the kings and of their own past battles.

1. The writing of people who owed everything they had to Alexander - Ptolemy, Aristobulus, Nearchus, etc. When Ptolemy became ruler of Egypt and effectively the patron/arbiter of all the Arts, Alexander was going to receive plenty of attention. However, it is interesting and significant that Ptolemy propagated the story that he was Philip's son - politically, considering the softness of the Macedonians towards Philip, this was just as important as being Alexander's half-brother.
2. The general political situation following Alexander's death. For all the Successors, they were wrangling over Alexander's empire, not Philip's. But, had Philip lived longer, who knows what he might have accomplished (lameness and blindness notwithstanding ...

3. The Romans, who were glad to have such a successful conqueror to idolise and emulate. Again, had Philip not died in 336BC, the Romans might have wanted to hear more about Philip. As it was, there were Roman writers, such as Trogus/Justin, who compared Philip very favourably with Alexander; but Alexander was the successful conqueror, so he was the one they called "Great".
All in all, Philip's death prevented him from achieving all he could have achieved, and gave Alexander the opportunity to do it 'all' - Philip deserves all the recognition he can get, and probably more than he has hitherto enjoyed. That isn't to say that Alexander should be belittled in any way - it's just the natural consequence of the son eclipsing the father.
ATB