I run two Magblades - a healer and a ranged damage build. Most of what I will discuss is related to Battlegrounds as that is what I participate in, but feel free to share your experiences in all PvP related content. I'm seeing a lack of Magblades in Battlegrounds and it feels a bit disheartening but I still believe in making the class work.
Healer - Maybe it's people finally taking NB healers serious enough to put focus on you or maybe there's just more damage in Murkmire, but those Healthy Offering stacks are rough keeping up with. I've considered using Naga Shaman over Shacklebreaker and going with Shrewd Offering for the reduced health penalty. This will give me Minor Mending, Major Mending, Minor Vitality, and Major Vitality (with Blackrose Resto Staff*).
Still running in heavy armor but seriously considering light armor. For monster sets I like Earthgore, Chokethorn, Bloodspawn, and Troll King.
Ranged Damage - I give credit to anyone who can run with Swallow Soul. I understand the healing potential of it but it just feels weak in PvP - and MagDKs especially make the skill even more of a joke. So I run Force Pulse and I love it! And to compliment this skill, I run Torug's with an Infused Inferno Staff. I tested all of the enchants for my damage bar but in the end they all felt inferior to Flame.
Running light armor with Blackrose Resto Staff (Berserker enchant) on backbar. For monster sets I like Troll King, Engine Guardian, or Bloodspawn. I would consider Elemental Weapon but from what I've seen it doesn't proc Caluurions (my other set). Caluurions is a good choice even for Ranged Magblade and I can make it extremely effective as you can see in this short clip:
*If you haven't got a Blackrose Resto Staff yet, I encourage you to get it - it's very good and helps make up for the Healing Ward nerf. You don't even need the Perfected one unless you feel you must have it. The duration is short and it can get expensive if you spam it, but there is no cooldown on the buff.
So just a few questions:
Are you still playing Magblade?
What are your opinions on the class?
What do you have trouble with?
Do you think melee Magblade is viable after Murkmire?
Also if you have any Battlegrounds clips from after Murkmire, post them here! Love to see other perspectives - I'll share some of my own if any are interested.