Well, I think the answer is, "it depends".
Everybody and every body is different. If what you're doing is working and you feel good, then why change it? If it's not, then consider a chage.
I like to keep my protein a little higher as it keeps me from getting hungry--my body burns carbs like pouring gas on a fire but protein seems to stick with me much longer.
I think the only thing about being too low in fat/protein might be if you're trying to retain/build muscle as that does require a certain amount of protein.
At the end of the day, it's the results that count.
47 M 5'8"
May 4, 2010...... 440? lbs. (Start FitDay Size 60 Jeans)
June 19, 2010.... 393 lbs. (First Weigh-in)
June 19, 2011.... 229 lbs. (164 lbs. gone in one year :-)
Current Weight... 185 lbs. (Size 36 Jeans)
Next Goal 169 lbs. (07/04/12)
Ultimate Goal 165 lbs. (12/31/12)
The best exercises for weight loss are Fork Putdowns and Table Pushaways.