Thanks to power creep in the Pokmon TCG, first edition cards are certainly not the strongest Pokmon cards in the game - in fact, you could argue they're among the weakest
Play it too late, and you may miss your opportunity to win the game
As a result, you need to have some graveyard hate like [card]Nihil Spellbomb[/card] or [card]Relic of Progenitus[/card], not only for Dredge but for Reanimator, Auriok Salvagers, and even Tarmogoyf control decks
I disliked how, in many cubes, can be locked into a controlling plan, orhas to be the fastest deck at the table
On the other hand, waiting too long to play around a threat that isnt coming may give your opponents time to draw an answer to your board state, which can cost you resources or even the game itself