The problem in a single player game like this is if you have a significant amount of content directed exclusively at a specific class or play style, people not interested are going to feel cheated out of content. For example, to me the boxing storyline is an annoyance because I don't like focusing on melee combat. Clearing it from my journal is a chore, that I kind of cheated through on my last playthrough. I think the system we got works better with the game's various options to work through missions whereas a more netrunning specific system wouldn't mesh as well. The focus and scope of things would be significantly altered to the point of it being an almost completely different game. I would love to play that different game, but I think it does need to be a separate game...or a DLC
Definitely. From a developer point of view it's a bad investment to create a ton of content for something that'll be entirely optional.
However, I don't see why CDPR couldn't have created a better Breach Protocol game. I agree with OP - the current version of Breach Protocol is weak. It wouldn't necessarily had taken a ton of resources to create an engaging minigame. Something quick and still relatively in-depth, like a Pokemon battle.