As other posters have put:
1. Cram is not a journalist and never claimed to be, the TV programme was simply designed to give Coe a platform on which to try and tell the public what he intends to do to improve the sport, and tackle doping. Cram is a familiar sports personality to the British public and does the BBC athletics coverage, that's all.
2. I am completely neutral towards Coe as IAAF president as it stands right now. However, unless you accuse him of prior corruption during his position as VP there really isn't much to criticise him on right now. He hasn't had time to make any real changes; he hasn't even had one athletics season. Things won't change overnight and it is easy to sit at home and shout baseless or hasty criticisms. Hopefully, he can bring in longer bans and toughter sanctions on athletes that have been caught. We will see in time if the sport has been improved. It is unhelpful to complain about the state of the sport right now and blame it on Coe.
On another note, things I would like to see brought into the sport with regards to anti-doping:
Longer drug bans say 8 years from all competition and organised training.
Random drug testing on athletes entered to IAAF events before they compete.
Lifetime bans from IAAF events.
Sanctions on coaches who have more than one athlete caught doping.
Make it a criminal offense to supply athletes with PEDs (difficult to do).
Athletes must pay back all prize money.