Everyone should choose a gambling platform that suits him. The 1xBit negative opinion was built quite a long time ago and is not easy to rebuild it. Of course, if someone tried to cheat 1xBit, he would have to take into account the loss of winnings. Recently, however, complaints have been positively considered. Let's wait for users feedback and then we'll see if it's true.
Even the recent issues are resolved positively, it doesnt mean the past issues (that are not resolved yet) would be forgotten. As you've said its not easy to rebuild the negative opinion (and I dont think its just an opinion because it has a basis and proof) so its understandable why gamblers are still not considering this site as trusted because it has a bad reputation. Those gamblers who still play on 1xbit are likely not aware of its reputation for not doing their own research.
Bitcointalk is not an official way to solve such problems, but as you can see, support is not completely passive to them.