The reason that it is not the other way around is that:
With the price of 1 old PAC coin at 1 Sat you cannot drop lower than 1 sat, keeping the bloated sell price, indirectly pulling up the price of other trading pairs (e.g., in DOGE) from , say, equivalent value of 0.1 sat to nearly around 0.8 satoshi. That's why trading pair in DOGE denomination is not maintained at one of the exchange.
If you start trading with 1 new PAC (after the 1:1000 reverse split) the value would not necessarily stay at the corresponding sell price of 1000 sat and may drop to 100 sat and still rooms for even low prices, especially with presently bloat prices by artificial means.
I think it is a different matter.
Its more to do with able to perform transaction, than trading value.
Both exchange are currently unable to deposit or withdraw paccoin.
My guess is that the two exchanges has received and acknowledged breakcryptos warning letter. Which most likely wallet will remain under maintenance indefinitely, as new dev team are working on the new coin.
With the conversation going on in github, it also seems that the founder dev is not going to update the current code.
In limbo we are.