CZ's going to be involved inside Binance because it's his company he won't let go or be pushed outside. BNB won't lose value because it'll gain when bull season makes ppl buy bitcoin so the market's going to be steady.
A fully regulated Binance with new CEO could help ETF approval so it could be a new beginning for crypto in America. I don't know how a new start for Binance's going to affect other countries but if exchanges scandals & allegations end it's good for crypto.
I see the current series of events as a new beginning for Binance exchange and the crypto industry as a whole. Confidence will be restored, while industry players will work closely with regulators in the long run. CZ can still have an influence over Binance without the need to be a CEO. He will be more of an advisor to the company than anything else. Who knows if BNB is bound to return to its former glory soon?

I'd wait and see the outcome of Binance battle with the SEC which is still a work in progress. SEC recently confirmed that they're still going after binance and that the DOJ settlement will only serve as fuel for its battle with Binance. Till all the legal battles that Binance has settles down, I won't be too involved with using that exchange as much as I used to. Binance is already losing its market share to the likes of Bybit, OKX amd Kucoin but I don't think any of these exchanges have what it takes to completely dethrone Binance — so best play imo, it's to wait and see how it plays out.
I believe this will end up with paying an amount to settle all the cases against CZ. SEC is after the mone after all, if they are not they won't agree for 4.3B settlement.
This is no doubt will happen if Binance fixed their legal hurdles. Just like what happens when XRP survives theirs. So I guess it is somehow good to take some gamble and buy some BNB in the market. But obviously we should only invest what we can afford to lose because cryptocurrency market is always unpredictable.