Nope, maybe you can point me to what you have read.  However, sometimes the case is made that the immutability of contracts is a flaw.  This is not the case, it is mainly just that the proper methods of producing and designing safe and secure dapps has not been made 'easy' or mainstream yet.  This is not a flaw with Ethereum as a protocol, but more or less a necessary change of the development process must be made for ETH dapps.