[
[A]. Bitcoin transaction (Blockchain technology) in my view should be improved in such a way ,
That modifications can be to either where a wrongly sent transaction could be reversed when sent to a wrong address,
For someone who was in this Bitcoin field since 2014 im surprised that you are asking for this.
Irreversible transactions are actually one of the key features of Bitcoin and what separates it from traditional banks as it gives the network more credibility.