I have high respect for HHDL and Earth would suffer a huge loss if HHDL decided not to reincarnate here. But I would continue to listen and follow the teaching, guidance and instruction of my lama who may not possess the qualities of HHDL. For it is my lama who is my teacher and guide, the one without fault.
The world would be a peaceful place to live in if only its inhabitants do not focus on politics. But where there are humans, there are politics. There is no escape.
I really liked what you said here. If HHDL passes on and decides to not come back forever, it would be a great loss to the world, especially to the Tibetans if they do not buck up and start to do things to take care of Dharamsala and the state of affairs of Tibetan Buddhism and its unity, but it does not affect non Tibetan practitioners as much as it affects the Tibetans.
Ultimately, if we all have our respective teachers and we follow him all the way, we do no need to depend on the Dalai Lama as much as the Tibetans do which is why i find it hard to understand when some western practitioners worry about this issue because, how will the Dalai Lama's absence affect you exactly when you're not directly connected to him as you already have your own teachers?
If our teachers are the one who can directly benefit and teach us, why would it be that we value the Dalai Lama over him and even go to the point of damaging others in his name? Which part of Buddhism teaches that or in what way is that Dharma practice or Guru devotion? Its just us covering our own insecurities in exchange for damaging others and at the end of the day we will be at the losing end.
It is different if you choose HHDL as your teacher, but then again you would need to follow all of his instructions to his disciples as much as possible, from the various books that he wrote so far. In any case, it would not make much of a difference whether or not he is alive as you cannot get direct and personalized instructions from him as he has no chance to observe you and vice versa and you can only learn from his books and recordings.