Elec blast and generally always had a "good history" - it always "used to be ok" but since forever it's got left behind. It "used to" excel at PVP, but then ED and -End got mitigated. It "used to be" one of the best control sets outside of being a controller but almost any other blast set can claim that title, especially Water. And why play an Elec blaster when you can play an Elec controller now? It "used to be" able to drain an AV's end but there's no chance of that now.
In fairness it always "used to" have a useless pet. Some things haven't changed. VS remains roughly as useful as a rubber duck in the Sahara desert. (But that in itself makes it so skippable it relieves a tad amount of pressure on decision processes. I don't know if that's sufficient excuse however.)
But it does seem odd that it has this kind of mythical aura (I suspect strongly, that there's a lot of rose tints going on here too) that once upon a time it was very good. But it never has been good in my opinion. Not since 2006 when I first rolled my namesake.
But... it is fun. It can do some interesting things, and built right, and played right, it can be a boatload of fun. It's challenging to play one to its best, and that (to me at least) adds to the fun. But maybe that's just my take on things, but I've always been one who roots for the under dog. I've always enjoyed the comic characters who have fewer, weaker powers - in my mind that's what makes them great and although I didn't build Scarlet to be that person (I didn't know how Elec Blast performed in comparison to other powers) it didn't take me too long to realise that's where she lived and one reason she became my main for so many years.
Is it worth playing? If you enjoy working hard to get the best out of it, absobloodylutely. If you want to walk into a room and kill all the things before your team arrives, not so much. Does it need close and personal scrutiny by devs (of whom successions have failed to even raise a level of interested awareness of its shortcomings)? Very much so. Is it playable now? Yes it most assuredly is. It doesn't need a huge amount of but it does need some. The relatively recent snipe tweaks have helped Zapp take up a good deal of slack from the set but that's probably true of most snipes. But do something creative wtih the -End (maybe give a % to stun if an opponent's end gets too low, for example, or even better boost the amount of Endurance returned to the player, giving Electric Blasters much higher levels of sustain.) Give it a worthwhile pet, something that earns its crust, and do something wtih the nuke which is pretty horrible. (I spent a decade skipping it because it just wasn't worth the grief of the -End crash and lack of damage.That's been partially resolved but it still deserves more.)
Much of how you approach the set is going to depend on what you want from your character, and there's nobody else here can answer that one. Give it a go. You might even like it!
Yeah Electric Blast "used to be" a lot of fun. It still is to my mind.