After sitting and sitting during the last 3 years and facing almost the same situation im giving up the "search of the beauty ".....
Well, if its been this long without any progress (ie. there is no change within your meditation practice) then something is probably wrong. I already wrote what I could about your practice, ie. the fact that you now need to apply the vipassana technique to all those sensations that make up your current moment-to-moment experience. If this is done correctly you should naturally move to whatever the next stage is for you (a good sign of progress within your practice is change /for the good or for the bad/)
It seemed to me from what you wrote that you were looking for reasons why there was something wrong with your practice which you could fix and therefore go back to having the wonderful experience (what you called the most significant human experience). The point of the Dark Night (if that is where you are) is that there is nothing wrong with your practice, actually, you have done remarkably well to get this far, but the only way is forward, not back (the wonderful experience may not repeat, at least until next path). Now you really have to pay attention to what is going on (including expectation /its coming its coming/, worrying /my concentration is not strong enough/ and unease/suffering/unpleasantness/...), no other way forward. There must be a lot of things that you are currently not paying attention to, look for them and bring them out. There is nothing wrong, you just need to meditate and do it well (use the technique well).
As for technique, there seem to be a few Goenka practitioners who changed over to Mahasi-style noting (the style explained in MCTB ) with good results. If you seriously think that your current method of meditation is not working (if its impossible to make progress with your current method), or if you want to experiment, by all means go for it. I only have experience of noting practice and am a very big fan.
Take care.