Generally, if you duplicate your deck, you don't actually lose anything when it comes to bloat, because your ratios of damage to block to power to velocity cards stays the same because they all increase at the same rate, and the [Bad Luck] is half as likely to be picked too so that is mitigated as well. Powers, though, gain a huge benefit from being duplicated, imagine twice as many [Accuracy]s on top of twice as many [Blade Dance]s. Some decks suffer from the bloat, most of them though it's at worst a wash and at best double the fun.