Hi,
A couple of days ago, I decided to have my Sylvari Revenant Wynnach join the Order of Whispers during personal story step ‘A Tangle of Weeds’ (circa. 1325 in Ascalonian Settlement, so not talking about HoT here!). He was wielding the Caladbolg greatsword and his weapon skills were changed as normal.
However, he didn’t seem to have any utility skills! No healing, no elite. Nothing. I thought nothing of it at first, and survived the fight anyway (just!) as I put it down to the change of weapon.
Today, I have taken another Sylvari to the same story step. This time, my Elementalist Caerven. She still managed to keep her healing, utility and elite skills despite wielding the greatsword.
I’ve come to the conclusion it is because of the way Utility skills work with Revenant, in that once the Greatsword is wielded you lose your legend invocation skills. Below is a picture of Caerven with her full utility skill belt. Unfortunately I don’t have a picture of Wynnach without his, since I didn’t think anything of it at the time. It was a fairly tough battle for Wynnach though, I must say. 
