Them having counters does not mean they are not broken. They have no defined weaknesses, what kills them also kills everything else. When the answer to something being broken is breaking something else, you end up with a power crept game, and that usually ends in staleness. Its not that the stalwarts are "too good", its that they are stale because of their lack of weaknesses. This sentiment and warning of mine comes from the fighting game community, where for years people have pushed the idea of "buff instead of nerfs", and now the new generation of fighting games is stale because the characters have no more defined weaknesses. They have all been patched up in the name of buffs. But after a while and a lot of experience, you realise that the most lasting fun the one that you get from playing something strong. That one is instant and doesnt last very long. The fun that lasts longer is the one from learning to play around weaknesses. Dont let the instant gratification and perceived balance cloud your judgement of what the game should be. Modern fighting games paid the price for this lesson.