Adam,
I e-mailed you having not read this so I left the answer to your question out.
Yes, the individual problem has been removed from the selection process & been replaced with.... Nothing. However, if you look a little closer at your 'notes for OASC' (blue booklet sent from Cranwell), it does say that as of August 04, a swim test has been introduced.
Also, keep the maths studying up as there's still the small matter of the group problem & you can't rely on others in the syndicate.
Happy studying
Jay