Chilldonaldchill, isn't the point that schools all seem to be doing it rather differently? I can see why the situation you've described isn't much more stressful than ordinary A levels, because there's very little difference.
I'm not sure it's really what was envisaged in the guidance, but my sons would both have preferred standard exams so would grab the option you describe with open arms.
Their school has gone assessment crazy, possibly because they are concerned they have very little other 'evidence' to point to as they didn't manage to fit a single set of exams into the 6th form.
Even then it varies between subjects. Some, like History and English, are doing 6 x 1 hour assessments, which pretty much works out at the same amount of time the exams would have taken, so that's not too bad, if a little bitty. It's basically 6 timed essays, and if you're good at writing essays is perfectly doable.
One of my sons chose chemistry as a 3rd A -level, a decision he curses on a daily basis anyway, but he's been having 2× assessments a week since the week before the Easter holidays. Some are relatively short, more like 40-45 minutes than an hour, so he's finding it really hard to get into his stride.
He will have done about 14 of these tests by the time they finish, which is more exam in absolute terms than they'd have had with the 3 (I think) standard exam papers. Except, because they started in March, without the time they'd normally have had to revise. And they're covering the entire course content, despite the department having provided almost no live teaching during either lockdown.