I voted YES but I have a couple of problems with the question as worded:
If Watchtower scrapped the shunning policy due to "new light" and your family suddenly agreed to speak to you again would you accept them back?
First, I couldn't "accept them back" because I have never shunned them. The shunning has always been just one-way.
So, if my recalcitrant family members that have shunned me suddenly got back in touch I would welcome them. But I would be hesitant. While I wouldn't put any conditions on our relationship, I would be cautious. I would also have no problem letting them know (when appropriate) that I was very hurt by their behavior and that--if they want to become restored to my good graces--they will have to rebuild their trust with me.
I think it's important to keep in mind that (and without absolving them of responsibility) they are victims too.
Finally, your question only allows for family members to attempt to reconcile due to a change in WT policy on shunning. Would it be different if our family members decided to reconcile in spite of no such change? I think so.
Either way, I would want an explanation for their actions then and now, but I wouldn't needlessly expect them to be hoisted with their own petard of guilt and shame as the elders do in requiring excessive shows of sorrow and repentance.
(BTW, I am neither DF'd or DA'd, just inactive, but I am shunned nevertheless due apparently to my lack of attendance at the KH and my insistence upon having a beard and wearing brightly colored socks).