Adding in my personal feedback after playing around with the set a bit, and this is written from the perspective of a min-maxer that inherently builds characters to solo AVs/+4x8:
Pros
Energy Focus is a great mechanic. I enjoy the idea behind having branching ways to spend it and perform differently, if I want an AoE focus or ST focus at any given time.
The ET changes are great, I never expected us to touch the 1 second animation ever again and getting it back with the better game-feel of the screen shake on impact is a great choice.
TF's faster animation does wonders for the feel and flow of the set. Even if TF got a damage reduction for it, it's a great change all around as the excessive animation was problematic.
Bone Smasher and EP being brought up DPA wise is a welcome change, not entirely sure if necessary
Power Crash as an additional AoE and Whirling Hands being brought into line help TREMENDOUSLY for game feel for EM. EM, despite everyone wanting to talk about being an ST focus, needed more AoE. This game does not really revolve around ST, and further many many sets don't inherently trade off additional ST for more AoE, so this line of approach always felt extra punishing. By giving it access to additional AoE, even if it's a touch weaker, EM feels like a set that performs well in a group or solo.
Cons
Build Up should grant Energy Focus: Having to pop Total Focus to get Energy Focus for AoEing groups isn't baaaad but it'd help with the feel of the set, and allow more flexibility in play.
Total Focus granting 2 stacks of Energy Focus on crit feels almost useless. In a single target rotation the -special on Bone Smasher is nice but I'd rather have the ability to pop it on ET again and Bone Smasher consuming it feels bad because effectively I'd have to avoid using Bone Smasher if I want that Energy Focus to be used 'optimally'. I'd almost prefer to see Energy Focus be released as a bonus damage proc on any attack, and it just speeds up ET otherwise to give it general use, but that may be asking for too much.
I think TF should have a 50% Crit, if only because the crit ATs that use it don't get a lot of mileage out of crits on the set, making it feel weaker. I originally thought the extra Energy Focus on TF would offset the smaller crit, but it doesn't feel as rewarding due to my mentioned complaint above, where Bone Smasher doesn't feel like a great bonus for Energy Focus being spent.
Overall
I have dreamed of Energy Melee on Scrappers since day one on live. You're giving me that dream. You could give me the current crap version of Energy Melee on Scrappers and I'd be all smiles, this buffed set feels monstrously good even despite my minor complaints and were it released to live as is I think we'd see a strong positive influx of people enjoying EM again. Thank you, from the bottom of my heart, for at least letting me have this dream come true.