Weaver was obviously designed with sword in mind and it shows. Dagger and scepter are in need of some love, and the only reason staff gets away with being good is for its ability to spam dps skills in pve/wvw zergs. I think one issue is #3 weapon skills are too important to get locked out of and double attuning feels awkward with the exception of air with fresh air. You're also locked out of important secondary skills until you go through another attunement. You tried to mitigate this by introducing unravel but unravel is never worth replacing another utility and has never been a thing. Take scepter for example, without double attuning we are locked out of phoenix in fire and our pitiful water trident. This also means when running focus we don't have immediate access to our earth 4 and 5 which are crucial for survival. Sword gets away with this because you have access to a heal/evade on water 2, mobility/cc on air 2, and an evade on earth 2 leaving you with more time and flexibility to access secondary skills you need.
Merge unravel into aquatic stance and introduce another utility skill. Right now unravel and aquatic stance see very little use, merging into aquatic stance would give you a small initial heal and direct access to your important secondary and #3 weapon skills. This would mean if you wanted direct access to phoenix in fire stance for burst you need to use one of your heal charges which is a fair trade off. You could then introduce a new stance in it's place, even make it a worthless one no one will take like a generic boon steroid. This change would benefit all weapons, not just scepter.
Or you could rework scepters dual water skills. NONE OF SCEPTERS DUAL ATTACK WATER SKILLS HEAL OR GRANT REGENERATION. WHY? The only defensive option we have with scepter dual attacks is a meager 1 second evade in fire/water.
I don't even know where to start with dagger weaver, that is an absolute mess. A fun mess, but a mess indeed.