I know what you mean. I think Image, or more accurately their creators as the company is a non-profit entity, got too excited at the buzz and growth a couple of years ago.
We have to be careful, creators are humans and are also hit by normal issues. We had some angry people at the Jupiter’s Legacy delays but they were almost all down to physical ailments (we know one contributor had a stroke, not all others wanted them shared in the public sphere). On Jupiter’s Circle the main artist hit a tragedy that is beyond horrific when his wife died.
Outside of that though, and those books are typically planned to run very long there is a valid question over how ambitious you should be.