The reading test again tests reasoning abilities. I think this module should have some grammar questions, comprehension by rewriting, maybe a bit of editing, and test of vocabulary or spelling. I like the part where candidates have to place the question to the relevant paragraph or match a heading to text.
The writing test is fine but should provide more choice: candidates could choose to write a letter or story, opinion essay or film/book review. Might be a good idea to have some grammar tests here too.
The speaking test is a bit silly. I would allow a candidate to be nervous ... I am not sure if they differentiate between exam nerves or stage fright and stammering. Moreover, as long as the answers are in correct English and pronunciation is fine, I would say okay. I think they should stop looking for answers as in the preparation materials. The whole test looks like a rehearsal for a short movie :)
The test is a bit long as well. I know that the test is a bit tough due to competition but they should make it a proper test of English.