No any significant changes from altcoins if bitcoin dump they dump, if bitcoin pumps they pump, as OP said, in bear market altcoins falls faster and I don't think that such perspective can or would change any time soon, the dominance is what's playing the effect here
Sometimes not all altcoins drop when Bitcoin price dumps. Stable coins and some altcoins that have good news still can increase their prices. But I agree that most altcoins follow Bitcoin price trend. So, what trend happens in Bitcoin, will be very crucial as it can bring some impacts to the altcoins market. This should be our consideration whenever we want to buy more altcoins. Don't buy altcoins if Bitcoin seems to have a dump, better to wait for a good trend in the upcoming weeks.