Weve seen it many times before: Sometimes it was weak, other times it can be among the best commons in a set, like in Bloomburrow
You cant nab your counterspells, give other cards flash speed, or otherwise play your instants at optimal timing
To stop them from achieving this, you need to save your counterspells for their most valuable cards (such as planeswalkers), even if that means letting less valuable cards resolve, such as smaller creatures
Protection is always important for the deck, and this adds that for the price of a Dragon slot
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I've done counters with only four cards, but I just finished a Frantic Search that used thirty copies