The slow timeframe was quite a long one for me. Mostly due to the fact there was little going on in the game besides the same files.
However, faster releases makes it hard for players to keep up unless they are already big spenders.
I would prefer a slower pace, but with adequate errata and rebalanced in between. This is one of the few games I've seen where a few changes can really change the meta. And this game has quite a good variance of decks and play styles. Even something as small as EX (8 main cards) can have huge changes to file power structures.
SO yea, I don't mind slower releases if they can make other cards useful. It would be like getting new cards to use without always having to spend money =)