I agree with the points made inflation and development cost. I would point out that when Pathfinder first came out the company/Paizo was not as big as they are now. They have the huge hit in Pathfinder and established relationships with printers and better understanding of the staff needed to get a major rpg to market. Despite that Pathfinder rpg was 576 for 49.99 and continues to be that price to Paizo's credit.
Starfinder is 528 for 59.99 people are going to want to know why that is. They may say something like inflation and development should be offset by the experience they have with Pathfinder. If anything it maybe should have been Pathfinder 528 for 59.99 and Starfinder for 49.99 and 576. That being said I am still going to get 3 copies.
I think this could be compounded if something feels left out of the rules such as ground vehicle weapons and combat. It may be said that the 10 to 12 pages should have been included that cover ground vehicle weapons and combat especially with the lower page count and price increase. Let me clarify by saying ground vehicle chase rules. Military ground vehicles (plasma tanks) would be an extra supplement in my opinion. I hope chase rules are included. I will also say that no one said they have not been included.
I also think that one of the staff indicated that the presentation of the book has advanced. I think something was said that they have learned allot since Pathfinder.
Another to thing to remember is the sheer amount of material that is compatible with Starfinder. Even at the $59.99 price point we're still getting an incredible value.