Seems Legit
As an engineer AND an RV-14 builder, none of those seem outlandish to me.
Sure, it is nice to be able to take an educated guess and provide a timeline, but these days timelines often change. If you think back to many products in the past that stayed on timeline at the expense of the final product quality, this is probably a net change of zero. Many examples:
Tires use to have "60,000" mile warranties, but would often not hold up to that large number, and they had a lot of fine print to ensure they wouldn't have to pay out. Now, those mileage warranties and associated fine print are all but gone.
We had those delays in satellite development as well. If something comes up, you can cause a delay to produce a product with the requested reliability, or you could gloss over it and hope it works...if it does and never comes to light, you look like the hero. What happens when it fails and your "oversight" comes to light?
I for one can tolerate a little shift if it maintains the integrity of the overall design goals. Just my opinion.