SD came across well, IMO. It must be really hard to know how best to argue this stuff for a general audience and she mostly did a good job.
Things that were done particularly well IMO included: stressing the reasons for having/retaining sex categories; drawing analogies with age & weight categories in certain sports; mentioning the importance of menstruation [i'd have been tempted to also mention pregnancy, nursing, maybe menopause too]; mentioning the impact on livelihoods; stressing that choosing between sex categories is unique to male competitors.
Things that came across less well - some of the talk around around more esoteric anatomical differences between the sexes, e.g. even if the 'Q angle' stuff is important I think talk of it is best reserved for very technical audiences, it can come across as a little strange/quackish.
I think I more or less liked her 'safety-fairness-inclusion' framework, exploiting the rhetorical power of three is never a bad idea, and it's absolutely right to put safety top, though she for me didn't do quite enough to really stress why fairness should come before inclusion. The other speaker was interesting in that she appeared to be tacitly acknowledging that therapy won't fully mitigate male advantages but intimating that she'd still want to argue the case anyway, it's relatively rare for trans rights campaigners to do this.
I think the single key argument, and in fairness SD started with it but for me maybe didn't return to it quite often enough, is that the whole point of, the whole reason for, women's sport, is to see how good it's possible for people to get without having been through male puberty. That's it, that's it's whole raison d'etre. Everything else flows from this. It's just like, say, the point of under-10's sport being to see how good it's possible for people to get before their 10th birthday; and the point of lightweight boxing is to see how good boxers can get without exceeding 61kg in bodyweight. Whilst it's true that a really exceptional under-10 athlete will beat almost all 11 year olds, and that a really exceptional lightweight boxer will beat nearly all middleweights, that's just not the point at all, neither point in any way invalidates the need for the distinct classes.