Graduated papers - they start with functional skills and progress in difficulty so that it's normal (and not a sign of failure) for students to not answer all of the questions unless they are the highest achievers. No gambling with foundation and higher tiers.
Dividing formal assessment over the year - not quite coursework, not controlled assessments, but properly invigilated, external examinations carried out, so that the overall grade isn't reliant upon a single day in May/right in the middle of Ramadan/the week a girl is due on/hay fever/flu/bloody ridiculous levels of heat/etc. Also takes away the all or nothing element of pressure. Then the totals are totted up to come out with the final awards. They could also be shorter examinations because they are covering a part of the overall qualification, rather than the entire course in three hours.
Grading to the functional requirement, so that somebody who would now get a 5, for example, is awarded a functional skills qualification in its own right, whilst somebody who would get an 8 is awarded functional skills and a GCSE automatically.
Spreading the mental and practical load over the duration of the course, providing multiple secure, graduated, less intimidating opportunities to accumulate knowledge and credit, minimising pressure upon resources such as space and creating a feeling that it's just the next assessment, rather than OH MY GOD THIS IS IT IF IT GOES WRONG WE'RE DOOMED.