Is bigger deck all you need? If the set-up is right, you will need consistently to get key cards to not die from the outset, so how does going big help with that? Also, if we improve decks as mentioned above then surely some would be more menacing that you can't simply outlast with big deck.
Having said all that, what you suggest would be good (thanks!), but it's a more sophisticated client change that will use up development budget, which needs to be steered to other things at the moment.
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