Dr Shabbir wrote this in his book "In my humble opinion, we should continue the ritual Namaz as it is until a true Qur’anic rule is established somewhere.
Since he has not responded to your post then allow me to resolve your confusion. If I am not mistaken, Dr Shabbir on this forum after repeated posts on salat, gave up this idea as it goes against the Quran [as he states] and keeps muslims preoccupied with mindless, empty rituals which serve no-one, least of all Allah.
The idea was to maintain unity by not getting rid of namaz but since all the sects are disunited and they all pray, it was doomed to failure. Unity can only come about by strictly following the Quran alone.
You are correct that getting rid of something that is ingrained in us from birth, the importance of namaz, is difficult and the example of brother Dawood, an otherwise intelligent man, juggling with verses, part of verses, and believing in things not mentioned in the Quran as a fact, is a clear example of this. I was lucky enough to be raised in a thinking and questioning environment, so removing indoctrination's has never been a problem as I have none, but I do appreciate the problems faced by some which is why I never tell anyone to give up namaz unless they are completely satisfied this is the right thing to do. No compulsion, but hurry up though!