Respectfully, I submit that Valimont and his supporters are full of crap.
/me points at the shields that actually get used in game.
Look across the decks in the various Deck Archives. Look very closely, and tell me how many damage-reducing shields do you see that aren't
clearly being used for their alternate functions? Permafrost is used because it's like Dusk or Turtle only it
also blocks damage; Hope is used because under the right circumstances it can block a
sh!tload of damage...and what? Mirror Shield happens to block a point of damage, but no one uses it for that purpose; they use it because it's Mirrored. And cheap.
But by and large, outside of Permafrost -- which is used quite simply because
doesn't have a lot else to offer most rainbows (and it's the best shield in the game, of course) -- what you see used are all of the shields that cause misses, not the shields that prevent damage. Fog shield gets used in more rainbows than Permafrost. Dimension Shield is possibly the most-used shield in the game.
Let me condense all of that into 10 words or less:
no one gives a crap about a couple of points of damage reduction. Fire rush won't use it; it doesn't defend at all. Fire stall won't use it; it's better off with Fire Buckler and healing. Mono-entropy might use it simply because it wants its quanta back...but when's the last time you saw a really competitive mono-entropy deck?
The fact is, these new shields add an option that will go largely unused -- like the rest of the Other cards -- except in a few circumstances that will be more cool than lame. They don't affect the "definition" of the elements at all, just like SoG and SoD don't -- we all still think of
and
as the 'healing' elements (even though it's been proved otherwise), and we'll all still think of
as the 'defenseless' element even if it has access to Tower Shield.
Count to 10, take a breath, step back, and look at it from tomorrow's shoes. What will
actually change when Tower Shield enters the game?