I would rather the user be able to make a fully informed decision about their GPU purchase.Would you rather the game stutter?
More over, if this becomes common knowledge it opens up room for a competitor to come in and shake the market up by offering high VRAM GPUs at reasonable prices (looking at you Intel). Although AMD could do the same. In some ways with its multi-chip GPU tech AMD is better positioned.
For that matter, AMD does have some nice 16 GB offerings already at decent prices from last gen. But AMD also has some crap 8 GB offerings that deserve to be rightly held to account.
What is going to be curious is where the 12 GB offerings drop in.