I like the idea of limited pieces and I can see how you feel betrayed but what happened. This said I can tell you from my own experience (from a piece unique)
that LE are not that much fun after all.
The idea to have something that only a few selected number of people have is a myth. Is not real at all. it doesn't make you one bit special to have something unique because by definition
each watch will be unique to you once you own it.
First I think that the odds that you will ever meet anyone else with the sub-variation of your dial are close to zero. Secondly, even meeting someone else with a LF are very low but of course if
you have other friends that are watch lovers this probability increase. Now to what the manufacturer did: nothing unethical in my view. They had a good design and created some different variations of it.
Many Independents (e.g. Moser) do it all the time probably because a lot of people/the market like these micro LE. Perhaps this is the only way to survive and justify the very high pricing for a time only watch.
I am just somehow saddened by the fact that you liked the watch (and the initial problem was solved) but sold it mostly for the steel instagram post. I just don't think it makes much sense but
perhaps you didn't like the watch that much after all.
Regarding service issues this is everywhere including Patek etc. so nothing new here....
My suggestion is to wear what you like and enjoy it regardless of the LE illusion that once again is unreal.