So, I haven't played this game since like 2008, I came back around November(?) and I was a kid when I last played, I had no idea what I was doing and so I didn't exactly bring much knowledge with me when I did return.
My first Homecoming main was my EM/EA Brute, and I very much enjoyed the sets aesthetically but I struggled because I didn't fully understand how to build him (I still don't fully understand, but I've improved my build by a lot since I hit 50). I just really wanted the flavor of a tanky boi who uses energy to attack and defend. EM/EA brute fits the bill for sure, but since I didn't understand how to build him, I wasn't a huge fan since I just felt super squishy as a tank (which I would later learn was a me problem). I've rerolled the toon a bunch, trying different combinations of Brutes and Tankers, eventually coming back to the original (thankfully I had the foresight to rename rather than delete).
So at first I thought it just wasn't a viable Tanker set since it was based on Defense instead of Resistance, that would explain why I felt so squishy using it, right? But then I realized that SR is a Tanker set based almost entirely on positional Defense (whereas EA is based on damage types). Then I decided it must be because positional Defense is just more viable than damage type Defense since it's easier to stack a bunch of defense bonuses into Melee Defense or AoE Defense, but I would later learn that my Brute is kinda tanky af once I got a clue how to build him, I also learned that base value of SR's Defense bonuses changes between Brutes and Tankers by a lot (Focused Fighting grants 18.5% base Defense on Tankers, 13.9% for Brutes); now granted SR does not grant you infinite energy, but it does buff your speed and attack rate. Then I decided maybe it's not a Tanker set because it grants stealth, and that's not very useful for a Tank, but then DA Tankers exist. Maybe because it grants like infinite energy and you never have to worry about running out of power between Energize and Energy Drain, but then Invulnerability gets a ton of passives that cost literally nothing, and having all toggles on costs less than 1 point of end/sec.
Finally today I just realized there's really no reason why EA shouldn't be available to Tankers. It's kind of a great foil to DA as well, both are based primarily on toggles, but one grants resistance and the other grants defense, both have stealth powers, one steals enemy health the other steals enemy end, and in that way it offers something kind of great to the Tanker class. Plus, aesthetically, nothing else looks like it. You get a unique flavor and playstyle.
TL;DR
EA should be a Tanker set. It would not be an easy set to use as a Tanker, but looking at how similar it is to sets like DA and SR, and how tanky EA brutes can become, I actually don't really see what the problem is. Aesthetically it has a very unique flavor that other Tank sets just can't deliver, and the playstyle is fun as heck. The only really necessary change is improving base Def values to make it on par with SR.