Right now I have 7 unopened boxes of Those new CE3, should I be worried, I don't think so.
From 9 new CE3, I got one leak and one died from dry burning(might be my fault). The rest still give me a better drawn and leak control compare to old CE3. With this good/bad ratio I think it's about the same as old CE3. I remembered with old CE3, I had to trash one or two each box due to leak, crack problem as well. What can I expect from Chinese Factory with less to none quality control.
I took apart the one that died and believe all parts in this new CE3 are made to be better than old one, better battery post, better silicone seal under battery post, and better tube (no visible crack or stress test). For plastic taste lingering, you should clean / soak CE3 in hot water before use.
For people who get dry hit, may be juice is too thick or too dark and you should adjust center post right away, don't keep on vaping because that will create gunk up around coil and will result in your CE3 not firing.
Just my 2 cents, pls don't quote me on this since I'm not expert or pretend to be one or even want to be one.