I think the greatest statement from the reported interview is Kibaki saying he regrets that the country was put in a campaign mode for too long from the 2005 referendum to the 2007 elections. This is what characterises Kibaki and separates him from Moi- for Moi "politics" is a 24 hour, 365 days affair (see he does it even after retirement!) and in my opinion Raila's style is closer to Moi's in that regard.
I respect Kibaki but I think that statement may explain his present zeal and that of many on the proposed constitution- that get over with it so that we get back to the other business of building the nation such as roads etc. I can imagine his agony in the wrong decision of letting PSs go to campaign for YES instead of doing the work they were hired to do.
The referendum is just the beginning, akin to "kuzaa mwana si kazi, kazi ni kumlea" and I think politics will for the next few years take central stage in our national discourse at the expense of other endeavours - the big work of implementation of the proposed constitution, if passed, is packaged heavily with political processes that will unceasingly until the next elections cause political overheating that Kibaki so clearly looks like he does not like but under which, needless to say, Raila looks unfazed and which I have no doubt Raila will quite ably navigate and guide. The two principals have their work cut out beyond the referendum and hopefully the present camaraderie continues. I think history is yet to pen Kibaki's legacy.
I need to mention that the draft constitution has provisions that are in my opinion quite WRONG and for which I am voting NO. They would not disappear if YES wins and left unattended, as they are likely to, would reduce my good assessment of Kibaki.