In case you don't know, one of Iwan's problems was his other commitments. He's been working for Sky the whole time and despite Ola following him all over the country, has struggled to find time to train for the show. He's even been over in Japan since the live shows began, but the BBC understandably didn't fly Ola there.
This means desperate times need desperate measures and the technical content suffers. Also, so of the worst moves like to break dancing and knee slide were Iwan's idea. On It Takes Two the videos of Iwan and Ola in the training room show Iwan finds it very hard to concentrate and talks non stop. He suffers from ADD, so maybe that goes along way explaining things.
Elsewhere the general agreement is Ola was a good choice for Iwan with his difficulties because she's very patient and a good example of her previous success is Kenny Logan. Kenny is dyslexic and when he started on the show admitted he could not hear musical beats. He has nothing but praise for her, especially as he now enjoys listening to music. The other pro who would have been good with Iwan is Kristina. Natalie is my favourite and she would have been great, but I get why Ola and Kristina are regarded as the best choice for less able celebs.
I do feel sorry for him, especially as he tried his best in the time he had and his self confidence will have taken a knock. But given his work commitments I don't think this was the best time for him to do Strictly and I wish his place had gone to another celeb.