A lot of people would assume that C2 is less powerful an engine than say.. MMF2, or instantly label it as a toy rather than game engine. Maybe it's the cheap price tag and one time fee which makes people think - "Hey ain't this a little too good to be true?" and don't get hands on with the tool before they judge.
I don't really know why, but in the past few reviews I've read on Construct, they never fully emphasize or even realize the simplicity of the engine and it's powerful capabilities. It's like they miss out on the potential of the engine.. but I know it's probably because we don't have many success stories and/or popularized titles made in C2 yet, so there's nobody going like "Woah, I can make a big title like SO and SO with Construct 2."
With Construct Classic we used to have brilliant designers like Konjak creating stunning visuals for his games, really worked well as a demo for the potential of the engine.
In the past few reviews, I've also noticed how they seem very nit-picky about small features (at the time) had not yet been added. Like one review on Indiegames which reported the lack of an .Exe exporter a week or so before Ash and Tom released r100 with the feature.
I think ultimately, it comes down to us to make amazing games to be testimonies of Scirra's amazing tool.