I've actually been following this thread from around Part 4 and finally thought I might wade in every now and then - this has honestly been the most well-educated, unbiased (with a few exceptions) and polite discussions on the trail out there and I'd love to join in. Also an extra thanks to the likes of Looking and Stack for all the transcripts and work in helping us understand the testimonies.
About today - I didn't get a chance to actually directly watch anything aside from the (IMO very very boring and pointless) testimony from the ballistics expert, though unlike Mr Dixon, he seems alot more qualified to actually talk about the subject. I did however keep up with the live commentary going on anyway.
I (personally) found the social worker testimony to be full of bias right from the start. I find it incredibly foolhardy of the defence to put forward a witness that admits to wanting to come forward for OP's sake, feeling that he is persecuted or something (I know it's not her exact words, but it's how she came off). Not saying the media hasn't been unfair to him, I just find it a very very strange reasoning that leads itself to questioning her motives, regardless if she really just wants honest justice to be served.
Not only that, she literally added nothing to the actual points of important contention. Yes Nel did lend himself to this sort of thing with his attempts of character assassination in OP's cross-examination and the defence has a right to challenge it (as per the Judge's decision on Nel's objection), but really her whole statement was pretty much inadmissivable, she kept stating what OP 'felt' (which she can never know) and everything else she said merely was a parrot of what OP said to her, which really isn't much more than we could get from his bail or the cross-examination of him. This I think is highlighted with her saying 'He loved her' (or something to that effect).
I have similar views on the worth of the anaesthetist, but I'll write my thoughts on that later. I'm not sure how the ballistics will go (ATM it seems to also add little), but right now it seems the defence is really grasping at straws with their witnesses. In fact, parts only strengthen state's case (e.g the discussion of OP admitting to a 'mistake' again, knocking his case once more). What even is the defence now? Involuntary action or self-defence?!