I agree with Fori, you are talking to the wrong sales people. For years early in my career, seems almost all I did was change out sliders to french doors. For your opening size and situation, you could use several combinations of door and sidelight combos. For example, a pair of 32" swinging french, with a 32" fixed sidelight. If your rough opening won't accept that, perhaps a 30" sidelight and/or 30" doors.

Forget what the builder is telling you, from what I am seeing in your pictures those marks are a definite flaw and the windows are totally not acceptable. The problem with micro-scratches in tempered glass is that they are very difficult to detect in the factory environment. The finished tempered glass looks perfectly clear when the IGU is being manufactured, but then they show up and are really easy to see when installed in someone's home. The scratches are specifically associated to tempered glass, so if you are seeing them on untempered glass then something else is happening and that needs to be looked at as well. I would contact Innotech directly and let them know what's happening, They are a quality operation and I would expect them to seriously respond to your problem.

mirror and frosted mirror are more economical than most clear or frosted glass. But the cost difference is small enough that when they go on sale at big box store, it easily swaps or evens out. Tinted mirror is expensive as they are not as popular.

We are in the PNW and our architect recommended the Marvin or Western, which has a telescoping door system. We went with the Western door (3 panel) and saved money. We also did a flush threshold. The framers need to make sure to account for this so don’t let them forget it. Despite us telling our GC multiple times, the framers ended up having to go back and create the threshold lower so it would sit flush. Since you are in the PNW, you should account for rain on the threshold. Our door is under a covered porch so rain isn’t an issue.