If you have it set to trilinear and you have mipmaps on, it will most certainly look blurry. Eg. if you took the image into photoshop and scaled it 50% with bilinear filtering, its going to look blurrier than an image generated at the correct resolution.
The good news is, if you add this to a sprite collection, turn off mipmaps and add a 50% font, it won't take any more memory than having mips on in the first place. Basically, pack both fonts into one sprite collection and make sure mipmaps are off. The tk2d packer tends to pack things a lot better than glyph designer, as it can rotate the glyphs too.