Has Uhuru and Ruto fallen out over 2022?

Now, the 2022 succession politics is already in gears. Some players like Ruto are already engaging gear 3. My observation is drawn to the relationship between the president and his deputy, in relation to 2022. Is Uhuru keen on having Ruto heir to the residence on the hill as per the purported 2013 MoU? In my honest opinion, the two have literally fallen apart. The only thing holding them together is some vested interests. 

There are a few indications that all is not well in the erstwhile political buddies. The most telling is the apparent disgust of Uhuru toward his deputy. Most recent is the 'kutangatanga' jibe Uhuru used in reference to Ruto's penchant for crisscrossing the country. Whilst many, Uhuru's apologists and Ruto's defendants tried to sanitize the statement, it was clearly derogative. Come on! Uhuru is no novice in Kiswahili. He knows well the meaning of kutanganga. It connotes moving around in a negative light just like kurandaranda, kuzururazurura, or kumangamanga.