Unfortunately it doesn't get any better in terms of engaging activities. That should have been done in Unit 1/2, given the flexibility. I remember when I did Unit 1/2, we ran the school's talent quest as a project. That was pretty cool.
3/4 is the nitty gritty theory - it will be very rare if you do any sort of practical activities. Disengagement and personal attitudes that are identified in unit 1/2 are signs that perhaps you are in the wrong subject. If it isn't a pre-requisite for any potential uni courses, I would consider a move.
Given it's not even mid-year yet... i'd give it a little while longer before you make the decision. Any Unit 3/4 subject you will find is primarily theory, unless you take up something like a VET subject.
(also keep scaling as a factor)
No No No.... You should be choosing subjects based on interest, not scaling. You are far more likely to score well in a subject you have an interest in. Don't just choose Accounting or Business for the sake of it, unless it is a pre-requisite for a uni course you are interested in doing after y12. If you want to ignore my advice and consider scaling.. then Accounting would be the better choice of the two, given Business scales down.