Depends on the ICO to be honest. Just because you can pay more eth with less dollars to invest doesn't mean the ICO will be good and the tokens will worthy anything. You can still select a horrible coin and it can go to shit and price could drop insanely, just because eth dropped this doesn't change. But if you want a good news most ICO's are dropping their entry barrier and their fund goals because the market is low and eth is getting low and people are investing less which means they need to drop so they can get proper investment. You can invest 1 eth and get a bigger portion of the pie compared to what it used to be.

I have noticed this many times. When markets are not with new blood, mostly no pumping are happening also most people stop their projects abruptly and absconded too. A healthier market always boost all other things within its environments in most cases and exceptions too applicable.