Babu, I think the problem with your eloquent reasoning is the imprecise term "macro-evolution". Your interpretation was... "Evolution By Big Steps", making it a whole invented concept different from real evolution.
Big steps never happen, and macro-evolution is not actually a process, it is only an "emergent property" of many many small changes.
Imagine this. If you use very small tools for many years on a large boulder, breaking off a grain of sand with each blow, you eventually end up with a heap of sand. Someone else (after you finished) can mistakenly suggest a special macro-process converting a boulder into a heap of sand, but in reality only the gradual chipping has ever happened. More importantly, the actual chipping process is now invisible to the new observer.
Also, you refer to a "partly evolved" creature, which is not possible. At any moment (including today) the genetic line is always intermediate between what it was long ago and what it will be far into the future. Whenever you observe the gene pool it is always "fully evolved" for that specific time period, and for that specific environment. Partly evolved is a hindsight illusion.
You are perfectly correct on some points...
"unthinking environment has no ability to design", correct, and no design is even necessary for evolution to be working, today and always.
"biological similarities ... no proof of common ancestry", correct, its not proof of anything its just an observation.
"natural selection ... not a creative force", correct, it simply happens, making some individuals marginally more likely than others to survive and breed.