It looks like quality filter was trying to hint you that your question is, well, not of very high quality indeed.
Trial web search for text rejected by filter gives a pretty strong indication that question does not show even minimal research effort. The answer (Electro Plasma System) is displayed at the very first page of search results; one doesn't even need to follow the links to find it out.
PS. I also wonder where did you get the idea about reduced quality. I mean, I went to Sci-Fi to look at the inflated version of your question - because I was really curious to see what could be worse than
^[.!?]* what does ^[.!?]* stand for[.?]*.
To my surprise I discovered that the way it is stated now your question just looks good to me (except for duplicate abbreviation EPS but that's minor).
- You may say thousand times that inflated version asks the same question as rejected, but this won't change the fact that looking at original text I felt nothing except a desire to downvote while current one would rather make me look for an answer.
To me, the changes you made don't qualify as quality reduction - rather opposite.