You won't have to worry about this until 1.20.

But to answer your question, it will likely be harder to get raw HQ materials after the update. However, final HQ mats (the ones you have to make) will most likely be equal to making +3 mats now. The only synths that guarantee an HQ result when using HQ mats will be finished items. So don't worry, it'll still be a pain in the ass HQing the mats for these

As far as dying goes, it's anyone's guess. I wouldn't be surprised if it follows the same rules as finished items though (requiring all mats to be HQ).