Hey!
I did CCEA Govt and Politics for AS, but dropped it for A2.
I'm sure you know what the structure is but just in case, for AS, unit 1 is politics in NI, unit 2 is the "British Political System" and then there's a choice between unit 3a and 3b, usually it's just what your teacher decides to teach. 3a is pressure groups, and 3b is the Judiciary (what I did).
Overall at AS, it's a lot more focused on how the government is structured/comparing the two systems rather than the nitty gritty politics (which is the complaint a lot of my classmates made). At A2 you go a lot more into political theory, and either the Irish or American systems.
You said that you're thinking about the workload and if any of the content is interesting?
For me personally, I'm involved in politics outside of school, so I loved it regardless. We had a really enthusiastic teacher who helped drive us to learn current affairs alongside the course, ensuring that we had a much wider knowledge of politics as a whole. Compared to the workload for my other STEM subjects, it was really quite nice.
Overall, I'd really recommend it for AS. Can't say much about A2. Do go talk to your teacher though and find out what optional units you are doing (if you're planning on doing Law, unit 3b AS the judiciary is the closest youre going to get) and talk to some of your Y14s to get their opinions now that the exams are over.
Hope this helps a bit, good luck for AS!!!