Thats a lot of words to say you don't know what you're talking about.
Linear refers to narrative, sandbox refers to gameplay. Mass effect is a linear sandbox. Fallout is a linear sandbox. Dragonage is a linear sandbox. Story driven sandbox games are... get this... linear sandboxes. Even with the branch endings (subverse will not have as there is no Player choice in their game design) as one of them is always officially canon. Subverse is a failed linear sandbox, as their only sandbox mechanic is fucking map travel.
I don't see how a barney style breakdown how "Subverse cannot have a retroactively designed and implemented companion system due to the constraints of voiceacting alone." wasn't enough for you. Yeah with massive blood, time, and treasure they could make it not a lie, but it currently was and is a clear lie in their marketing about what the game would be. A lie. Requires a rebuild of their game from the ground up, mechanically and narratively to ever not be a lie.
Bruh, be more discerning in what you consume and defend. If you got trapped by the 2 hour tutorial designed to eat up the return window and need to justify the purchase a lot of this starts clicking into place.
Have you played Fallout or Mass Effect at all? Once initial throw off is done, you can explore and do things in your own order. Dragon Age as well, your sandbox have options, you can do things in the order you want. Sure the story got a start and a end, but you can decide how to end up at that end. There is multiple videos on youtube about people doing speedruns of sandbox games such as Fallout 3, Skyrim and others, bypassing all content to get to the end boss (whatever). How that for linear sandbox for you? You have the over arching main story and then you have side missions, companion /relationsmissions + whatever. If all had been linear you would had to do everything in a specific order, which you don't.
Maybe you should hold off with your hammer of judgement until the actual loyality miissions with the waifus implemented and how the actual dating thing in the bar end up. I prefer to wait until I see how a early access game end up before I throw judgement, write a review etc. Doing it at a 0.1 release with a "know it all" attitude and have no idea how the game end up down the road is pointless.
As for VA. Many games out there had voice actors come back to revise. For dlc's, for sequels and so forth. You make it sound like they done all the recordings, no more can be added or changed. That is silly.
I don't need to justify "my purchase because I bought enough games on early access in the past to know what I embarked on. You always take a risk with early access games but to throw judgment based on the very first release is just stupid. Just as well silly to write 5 star reviews on early access as it is to doom it based on your own hyped expectations.
I never been trapped in ANY game I didn't end up like because tab back to windows and shut down the application is an option other than have to endure something you don't like... I guess you LOVED the tutorial.... although I suspect you didn't actually buy it on steam at all...