It is definitely different.

Back in 2012 the party is controled by a group of elder guys, though there is someone at the top.

Now it is dictated by Xi, who has already changed many things, like Chairman should only serve two terms. Luckily, he has no son.

Yes. For example, here's a commentary, published in 2012 by Xinhua, arguing that the time was ripe to reform the "reeducation through labor" system http://news.sina.com.cn/c/2012-10-12/152725346359.shtml (in Chinese, of course)

The reform did happen, replacing e.g. labor camps for drug addicts by forced detox camps, but those were mostly the same, still using hard labor as their main method to "rehabilitate" addicts. So not much changed in practice. https://madeinchinajournal.com/2019/10/25/punish-and-cure%ef... (this one is in English)

You may wonder why you haven't heard about this before. The answer is, I think, that most groups subjected to "reeducation through labor" are not organized and scarcely have any international contacts, so they have a hard time getting mainstream international media to report on them.