If we had better merits, His Holiness and Dorje Shugden, in their pledge to bring "us" into spirituality, would not have to use this rather unusual and rather confusing method of having a Buddha "banning" another Buddha and thus create a complex political situation, conflicts, confusion, ostracism and segregation for us to live in, face or even sometimes suffer from.
But the fact is this: for the vast majority of us, we only have the merit to get into spirituality through scandals, bans, defamation, "taking-sides" etc.... because that is where our mind is...
That is what "works" for us.
So I think only one thing can bring the ban down, and it is not for His Holiness to lift the ban, it is not for the CTA to lift the ban, it is not for Trijang Rinpoche or others to turn things around and lift the ban, no it is none of that, I think that the only thing that can bring the ban down is that we create the merits for this to happen.
I believe that the more we are, the more sincere we are, the faster this will happen.