There are 72,000 nadis and 108 chakras - so I am pretty sure there’s enough room to accomodate all/any chakras haha. I don’t see any issues with these chakras. PI, for some of his claims that I disagree with, does borrow Hrit Chakra (hrit = heart) from Ramana Maharshi’s teachings and Maharshi describes this chakra based on his practical experience.
Chakras are a construct, often a useful way, to interact with the energy body. There is a lot of flexibility in approaching them, as long as we are not going totally outlandish 
We need to abandon all constructs at some point, the key though is to do that only at the right time, and not throw the baby out with the bath water.