Yeah, white flour is pretty barren when it comes to nutritional value thanks to the refinement proccess it goes through. I'd take whole wheat over white anyday. I can't remember the last time I ate white bread. A little bit isn't the end of the world, though.
I am curious to see how homemade saltines would work out with wheat flour. I might try it. The saltines that I made the other day seem to be holding up well. They haven't gone stale, but they've lost all crunch that they had. I guess it doesn't matter if they're being used for soup. I used some of them in soup, and i'd definately say I liked them better than store bought.
As far as deciding wether making homemade crackers is worth it, well, I guess it just depends on the persons situation. For the person who is very busy and doesn't enjoy cooking, it would be a no brainer to get them from the store. For the person who enjoys cooking and can spare an hour, making them yourself is an excellent idea. I get a lot of satisfaction out of growing, harvesting and making food, so even though I stay pretty busy, I consider it an hour well spent.