When you say you've looked into the course content and you've found some modules you're not that interested in, which ones are you referring to? I'm sure you will be aware, but there are 7 core modules that have to be studied in order gain a qualifying law degree and these same modules have to be covered on the GDL.
There will always be modules on any degree that you're not the biggest fan of but if you think you'd enjoy 3 years of a non-law degree then that's something to consider. Also like 999tigger said, you need to consider how you would finance your post grads. Most firms tend to have a pretty even split of law/non-law grads so I wouldn't worry about that. You should also consider what type of firm you want to end up in. Some do care about the university your degree is from, others not so much. Although, if you're a good enough candidate, where your degree is from shouldn't matter