On another BB I watch, someone linked a news report that indicated there were a good number of Russian advisors at the plant and there were concerns that an air strike could be problematic if any of them were killed/injured.

I don't think that's a good reason in itself to hold off - I would not do it for other reasons but if you are of the persuasion that it will save more lives in the long run and that advisors are there despite warnings.....