I definitely prefer the "old" spelling rules, and I do so for politicial reasons: The language we use is not property of politicians, nor of people working in ministries. Those however were those who tried to impose the "new" rules onto society. Okay, I accept that someone has to decide what exactly is taught in schools, and what rules civil servants should apply when producing texts, but these decisions cannot be binding in any way for other parts of the society, including of course private individuals, private businesses and, especially, people or organisations who professionally publish things, e.g. journalists and newspapers.
The problem is, people in Germany tend to be overly attracted by rules and by what some people up in the hierarchy tell them to do, so many people seem to believe that the "new" spelling rules are something quite similar to law. Which they are not, and cannot be.
In everyday practice I have adopted the use of "ss" and "ß" from the "new" rules because this part of the "new" rules indeed simplifies things (ss after a short vowel, ß after a long vowel including diphthonge). For almost everything else, however, I stick to the "old" rules. Particularly so regarding Getrenntschreibung/Zusammenschreibung were the "new" rules would lead to misleading meaning and bereave us of nuanced expression.