Guild Wars 2

Hi everyone, its been a long time since I have last been on the forum ^^. Haven’t played GW2 in a while and I have come back to see all these changes to engineers! (and some good ones too.) I am looking at what has been tweaked in the engineer class particularly these three skill/traits, I tried looking at the forums and the net for confirmation if these skills are working as intended but hadn’t much luck.
Can anyone verify if these skills listed below work:
1) Elixir-S: can now stun break again?
2)Legs mods: does provide 33% on immobolize, cripple and chill? Is it now worth it to get this trait?
3)Healing Mist: is now a stun breaker?

And any more useful information of engineer changes since may would be very much appreciated.
Btw I have already checked out the game release notes but would rather get opinions and facts from the engy community as not all updates work as claimed to be.
Thanks.

1) Yes
2) No idea
3) Yes

Leg mods is useful, and there is food and other traits that can stack together to make it very useful.