Seems to me that a possible time trade off would be that since time to conduct work on site is weather limited, by stalling one risks the possibility of losing most, or an entire season of the work window

Assuming CUU retains some form of time guarantee for production performance, this could become a critical factor if additional problem are encountered along the way

Don't want that 4 year clause deleted, maybe just extended a bit, and hopefully CUU will keep some teeth in it to deter any stalling, like losing this year.....