They are not being stigmatized as a cult. They are a cult. So this one is simple, just stop being a cult, and show it.
It's interesting that you say this scratchme101
The very first time I saw Jehovahs Witnesses was when I was about 15 years old and with friends on our housing estate. We heard some commotion and saw an elderly couple at the door of someone we were aquatinted with. Another older man who looked like a grandparent was physically pushing the older man away from the door.
That's what drew our attention. I asked one of my friends who they were. He said something along the lines ' they are jehovahs'. I Immediately remember thinking they must be some sort of cult.
I think for the organisation to end people's view of them as being a cult, they would really need to make some radical changes. Some have already been mentioned, but I think the top ones are
That the GB accept constructive criticism
Review their endless rules
Stop promoting the shunning of family members.
Allow individuals the right to their own conscience when it comes to the blood issue, birthdays, holidays
Allow people to end their membership with the organisation without the fear of being shunned by family and friends. Allow people to come and go.
Welcome sinners back who have repented like the father did in the story of the prodigal son. Not wait 6 months or a year etc before Congregation members can actually speak to them!!
Allow men to wear beards.
Stop the suits and skirts only rule
Allow individuals the right to choose if they want to attend college or university
Make the meetings more interesting
Stop pushing Jesus aside and referring to him simply as the ransom; but rather remind everyone that Jesus IS our Messiah, Our reigning King. This needs to be promoted at every meeting. He is our Lord and saviour.
Stop being intrusive, restrictive and controling.
These are just some of the changes watchtower would need to make to normalise the religion as a Christian faith group imho