It's simply a game design decision. Allowing the players of a game additional customization of the game experience tends to sound good to players, but it fundamentally changes/breaks the challenges intended to be presented by the designer. I would say there is already a more than sufficient level of customization in the selection and tuning of cars for players to find an experience that they enjoy.
While rolling starts may be a result of technical limitations (although I only remember KY talking about framerate hiccups in rain starts, not 16 car standing starts), there is also a challenge factor. The gap to the lead car changes significantly between the different types of starts, which presents the player with a different challenge than a standing start. Since the AI is already fairly compliant with allowing the player to pass, it seems unnecessary to lessen the starting gap. To me, that seems more likely to be the reason for the choice of starts than technical issues.
As for qualifying, allowing qualifying for races shifts the focus completely to grid slot selection via qualifying and the race itself becomes largely superfluous. I have no desire to play a qualifying game, which is where the game ends up if qualifying is relevant. In addition, qualifying was so broken the last time it was in the GT series that i am just as happy to not have it in the game. Even if it means I can't pretend to be Vettel.
While rolling starts may be a result of technical limitations (although I only remember KY talking about framerate hiccups in rain starts, not 16 car standing starts), there is also a challenge factor. The gap to the lead car changes significantly between the different types of starts, which presents the player with a different challenge than a standing start. Since the AI is already fairly compliant with allowing the player to pass, it seems unnecessary to lessen the starting gap. To me, that seems more likely to be the reason for the choice of starts than technical issues.
As for qualifying, allowing qualifying for races shifts the focus completely to grid slot selection via qualifying and the race itself becomes largely superfluous. I have no desire to play a qualifying game, which is where the game ends up if qualifying is relevant. In addition, qualifying was so broken the last time it was in the GT series that i am just as happy to not have it in the game. Even if it means I can't pretend to be Vettel.