I'd like charges on Displacement / Corps à Corps, 2 would be enough I think. Currently, holding them when dealing with a mechanic while spending mana with Reprise to avoid overcap can lead to weird alignment until the next Manafication.
I agree that the mana gain from the AoE rotation is slow, they could buff it a bit yeah. But I still think RDM's AoE is a wasted opportunity to have better spells or a more fleshed out rotation. Scatter into Moulinet could have had a few tweaks (like refreshing Contre de Sixte or a proper AoE finisher) and be efficient.
Now the 2 target scenario is more interesting with Alexander around the corner. I'm not sure having a cleave effect on VerHoly/Flare and Scorch would be enough though. Maybe buff AoE VerThunder/Aero so that they are worth using on a two target setting?
Maybe an "unpopular opinion" but I feel the whole "Enhanced Manafication" and "Reprise" overcap is a poor idea to try to make RDM more engaging. I don't think it's really intuitive nor satisfying in the 120s rotation, I'm not a big fan of Manafication (and Embolden) giving a magic damage buff and still leaving out our physical attacks.
I'm still sad to have lost Impact management (when it could have been incorporated with charges, Scorch or anything really) in the rotation.