I know it is quite a difficult concept for people to get but merged mining does not make a child coin more or less independent...
Merged mining makes coins less independent. If people choose to issue their tokens in ClearingHouse because of Litecoin/Doge' hash power, then ClearingHouse' success is somewhat more dependant on Litecoin/Doge' success.
Just to be clear I'm not saying merged mining is bad. If it's necessary for security reasons then I'm all for it.
With merged mining enabled there will be more viacoins on the open market because more viacoins will be mined by people who don't want them.