Without Cabal Rituals, TES isn't very susceptible to graveyard hate to begin with. There's Ill-Gotten Gains, but we're talking about potentially replacing that with Past in Flames. I'm perfectly happy to have Maverick (say) bring in Relics or something like that. Trying to combat TES with graveyard hate, even in the hypothetical situation where we all end up playing Past into Flames, is an ineffective enough strategy that I think we needn't worry.