All this hate for Kim Dotcom aside, he didn't literally write it, some developer did, and if that developer is anything like me, he's going to want to take care of his baby, and these recommendations are going to immensely help him do that.
What would Dotcom gain from having a weak crypto system. Plausible deniabilty will work up to a point, but the government can still subpoena his encrypted data, crack it themselves, then require Dotcom to comply. And if Dotcom actually acted (or even accessed) the data, then he would through plausible deniabilty out of the window by demonstrating that he does have access to the data, in which case the entire exersise in creating the cryptosystem is pointless.
But he might not be like me, so I dunno.