1.Stats: Should Staraptor get a stat boost, Evolution, Mega Evolution or nothing?
At maximum Staraptor can get +55 BST boost. But 10-15 is more likely.
Staraptor cannot evolve further, but a side evolution would be great. Could be faster or specially oriented.
Staraptor definitely deserves a Mega.
2.Should Staraptor get more abilities?
Yes. Staraptor only has two abilities. Defiant, Sheer Force, Gale Wings and Big Pecks are options.
3.Should Staraptor get more moves?
Yes. Dark-type moves like Beat Up, Assurance, Flying moves like Acrobatics, Fighting moves like Superpower and Bulk Up, Normal-type moves like Swords Dance and perhaps some other moves like Psycho Cut can work.
4.What additional typing Staraptor can have?
Dark and Fighting are obvious ones, but Steel and Ground can work as well.