This is going to be a very unpopular sentiment, but personally I'd rather see things that are OP for invading get nerfed than OP defense troops. You shouldn't be able to average under a minute on invades for hundreds of invades. Anything that slows that average down I think is healthy. There's probably a couple troops that get used 70% of the time to invade but nobody complains about those being OP....
Heaven forbid it takes more than a minute to finish a match or there's a higher than normal chance to lose. Besides, if you're blowing through matches that fast what does it matter that all defense teams are a variation on the same theme? If you're driving 150 mph you're not going to take notice of the scenery.
If you're doing a lot less invading and all you see is the same defense team the complaint is a bit more legitimate and agree that's boring.
shrug to each their own. Point is he's "fixed" so people can take up their pitchforks against the next most heavily used troop.