Those are the rumoured changed in the April 30th update:
Another thing in the patch will be, that Elementalists skills that destroy projectiles will no longer affect trebuchet shots.
- Ele mist form locks you out of utilities (No more #6 healing in Mist form). This will hit Cantrip builds hard, reducing the survivability of Eles
- RTL Changed to be 40 seconds, but if it hits something it will be 20 seconds (Blocks/invul ect count as a hit). Yet another big nerf, no more RTL travelling boosts.
- Signet of Restoration passive nerfed slightly.
- 30 Point trait that removes a condition upon gaining regen (Cleansing Water) will have a 5 second CD. And another nerf
- Conjure durations increased. Still kind of useless
PS: Thieves & Warriors got buffs, because they need them (getting 3% damage increase per boon and boon stealing sword attack)?
I was hoping for some Scepter buffs, but I have to read the final update notes. This after all is just a rumour quote.