Add Nogdar to your rebalance list, Plarium
Pretty please? He's one of the coolest lego champs in the game, as far as design space is concerned. He has an absolutely unique kit, centered around intentionally bringing himself as close to death as possible. But he's crippled by an absolutely nonsensical decision to make both his A1 and his A2 provide healing.
In a perfect world, you'd run his A2, and use a Frenzy set to get a big TM boost as a consequence. Then you'd use his A3, and, again with the Frenzy set bonus, set yourself up for an insta kill with the A1 and an extra turn.
But you decided to make both his A1 and A2 heal, so instead, what happens is, you lose half your HP, but then heal back up to 80% from the two CHs on his A2. Then, when you do your swap, you only bring the enemy down to 40%. Might still be enough to kill, but unlikely, especially in the obvious place to use him - DT Hard. And that's assuming nothing else on your team tangentially also heals him.
Here's the thing - rebalancing him would be *super* easy. Literally all you need to do is remove the CH on his A2, and boom, he becomes instantly viable.
But why stop there? Let's make this unique champ truly unique. Rather than just removing the heal from his A2, how about change both the A1 and A2 to provide a shield instead? Make the A2 provide a shield valued at 20% of the damage done, and the A1 at 10%. Even better - make the A2 also provide an extra turn, so he can really get his combo going.
And before you start saying "that would be too powerful!" - he's a lego champ, in a sea of other, much more specifically nuke-oriented lego champs. Let's make him unique! Let people build cool, interesting teams around his unique kit.
(and yes, I may potentially be biased, since I have three of him now)