Not really that bad, movie comes out in 5 months.
Civil War had reshoots back in January of this year and took another two and half months to finish (the film) and it comes out next month.
It's not a response to a bad review or a previous movie but it is the norm. Singer was doing some reshoots like 2-3 weeks before DoFP released too iirc.
I'm also waiting for a more reliable source, David Faraci (the guy who everyone uses as a source for this report) is an avid DC hater. Dude was already saying Mos and BvS were terrible months before anyone even saw a screening of the film :lol
Usually there's another outlet or two that confirms reports as big as this but so far I haven't seen it.