Might I sugjest a way to modify text size?
That would have both positive and negative effects. On the one hand, card creators would be more free to invent elaborate card concepts that require larger bodies of card text... but I see this as a bad thing.
The current limitation on card text is not without its reasons. For one thing, take a look at the text on the cards as you see them in the game - it's already pretty tiny. The more text you try to cram into a card that small, the less readable it will get. Also, promoting simpler card ideas can be a good thing - as I have often said, simpler ideas usually lend themselves better to interesting tactics and unforeseen synergies, and they usually require less balancing. Finally, forcing card creators to use less text on the card means that the text we DO use will have to be as clear and succinct as possible. "Brevity is the soul of wit," as the saying goes.
I've had issues before myself with fitting card text on the card, but when I do, I often take that as a sign that maybe I need to simplify my idea. There are exceptions: my Summer weapon, for example, has to put the traditional weapon text on the top two lines, so the bottom two are all I had to describe the weapon's ability. Took me a while to get it to fit and still be clear what the card can do.