This is the real danger. If a warrant is served on a residence, someone dies as a result, and no evidence of the crime outlined in the warrant is discovered, the entire investigation is suspect. The investigation itself should be reviewed by an outside agency or Grand Jury for evidence of negligence or wrongdoing.
If you kill a man in his own home serving a warrant, you'd damn well better be willing to show why you had justification to obtain the warrant. Sealing the case looks like an attempt to sweep things under the rug.
I also believe that SWAT serving a warrant for suspected drugs on a home where children are present is an unnecessary risk and tantamount to child endangerment. This is the one time where "do it for the kids" needs to be applied. In this case, wait till the suspect is outside the home to serve the warrant or until the kids are somewhere else.
Just call a spade a spade. That's exactly what it is.