Awww, I understand that. I was hoping to use the (appropriately priced - free isn't sustainable!) higher res pack to build one of my first retro-looking games, but the pack as it is now will cause the textures to stretch a bit too much. There's no AI which could upscale your work in pixel art!
You're surely more informed than me but - retro shooters are quite the trend so a texture pack could be a nice investment.
(actually, there are too many of them - the problem is that they're a bit bland - the textures aren't the problem! :P )