The course is mostly computer development side, where im not doing so great, and little games development, so i am not really enjoying it. I have been looking at job postings and none really mention requiring a degree or that they would prefer one. I do already have some higher education with a "Level 3 extended diploma" though.
Are degrees worth it for this area? Would it be a good idea to drop out and working more on a portfolio?
I think you're asking the wrong question.
I dropped out of school myself, and ended up a game producer. Do I regret the choice? Absolutely not.
That being said, it was a risky move (when I could afford it) and I'm paying for it now, daily, because I'm lacking some of the theory.
At no point did I ever base my decision on what 'requirements' were advertised for the position I wanted to occupy.
When you drop out of school and want to make it, you start to focus on the knowledge you need to possess as opposed to the degrees you need to have.
Your future employer might, like you, not give a damn about the degree, but he might expect you to know things that are inherently part of the curriculum. Unless you plan on learning them by yourself through hard work, the degree is still 'required'.
Ultimately, landing a job is about convincing the person in front of you that you are qualified to do the job and get results. Having a diploma to back you up is essentially saying 'hey bro, the state trusts that I have the necessary knowledge to do this job, so test me all you want, I doubt you'll come to a different conclusion' whereas no diploma doesn't.
People are likely to pick candidates with a diploma first for interviews and only audition the others if they feel they don't have enough candidates.
The best level designers that I know happen to have experience in nearly everything game dev related. They could make a game from A-Z as a one-man army. They are versatile. I think game/level design, in general, is one of the few jobs where it's better to know a little about a lot than a lot about little.
So, maybe the degree isn't worth it for you, that solely depends how hard you're willing to work on your own to get there.