I really see that as "maturity" rather it is nitpicking and to some extent, not understanding.
I mean we are talking about 200 to 300 hp here, not some absurd 500+ muscle car you can't use on the streets. 200-300 hp isn't out of the norm for regular driving and you can feel that in overtaking someone, acceleration needed to get on the freeways, etc... You don't need to be on the drag strip or the track to enjoy 300 hp. Like I said before, if the CLA has 80-100 less HP, I doubt dude would buy that car or even enjoy it much. That'll be moving like a Prius and who would pay $40k-$50 "luxury" vehicle that would run that slow?
If you don't understand and do not think you can utilize an extra 40-50 hp on a 200 hp car in real life driving then you just aren't much into cars and discussing it would be a waste of time. Again the discussion wasn't about 500+ hp being put on the C-Class.
On an unrelated note, I personally hate that the CLA is a FWD and I am not liking the trend happening with the A3, Q3, NX and I think the new GLA will also have FWD along with their turbo I4 engines. I am so happy that the X1, 1-series and 2-series are still RWD.
The difference is that BMW actually took a step down, they tried to sell more cars instead of staying the top of the heap. Overall, it is still a successor just for the simple fact that the 3-series trend moving forward have been to get bigger, wider, longer and more hp and the F30 did just that. But through the generations, they've been sacrificing the driving experience which is bound to happen as the car gets bigger. They seem content in letting the 1-series and 2-Series and M3 take the reigns when it comes to driving experience and let the 3-Series be more of a luxury car. So in a way they are shooting themselves in the foot but it results in more sales so they're happy either way.
I just think Benz has a very long way to go to become the benchmark for it's class.