To me, CTA upholding the ban is a sign and indication that they are too weak to rule on their own, that they are using the Dalai Lama as a crutch as opposed to a spiritual leader. The Dalai Lama may be responsible for the happiness of the Tibetans, but certainly not in the way that they want him to be: by being their secular leader and also the spiritual one at the same time. that will not happen. The Tibetans should start being independent and not rely on the Dalai Lama any longer.
Ironic, isn't it? This is actually the perfect opportunity for the CTA to prove what they're made of and show the strength of their mettle. The very first step they can take to achieve this is in fact to separate the state from the church, make a clear delineation between the edicts / guidelines set forth by the Dalai Lama and those that they stand by as the secular government.
The very first act to solidify this move would be to remove the ban on Dorje Shugden. Sure, they can still respect what the Dalai Lama has advised. If they are direct students of the Dalai Lama, it would be their own individual prerogative and decision to continue or stop the practice, but on a professional level, as a secular government, this religious edict should not impact the way they treat their citizens in any way. They should make a point to ensure that ALL the Tibetans under their governance be granted equal opportunities, welfare, civil and voting rights, travel rights and all the most basic human rights. This would be a very powerful first step for them to gain respect and standing in the eyes of the Tibetan people. It would strengthen them as a government to make their own decisions for the betterment of ALL their people.
This is not to disrespect the Dalai Lama and the spiritual aspect of their culture and society, but rather to create an even stronger community to be able to support the best possible spiritual practice. Right now, spiritual communities are breaking apart and there is no support or help being offered from the very government that is supposed to protect their people's best interests, across all fields. If they could build their secular base and make it firm, then any spiritual directives being issued by the spiritual leader can be executed in the fairest and all-encompassing way, without disruption to the quality of life and basic rights of Tibetans.