So by looking at this it is quite understandable that they cannot do some things outside their authority to completely overhaul the players because in the end this could interfere with their own electability and cause other problems that make them have problems with the rules given by the federation in the EPL in the end.
I heard about the same thing, but does this limit their ability to get loan players? They can hire free agents or something if they can't buy players. Sure they might not make United compete for the top 4 after a month in training but at least you'll have options. Especially after you let some players go through this window. At least this is the sentiment I saw in social media from some United fans. I guess you could argue they'll use the academy to provide backup but that's also risky. To be fair there's no instant fix for massive debt after a change of ownership. CMIIW.