I chose Construct 2 over Unity because I too was coming from Flash, 2D and fake 3D. So, I would say yes. For me it was extremely easy to switch to Construct.
Where flash ( or whatever they call it now ) is still way ahead:
1. Drawing, creating and animating graphics within flash ( with Construct you will have to draw in some other program, perhaps even Flash and import into Construct )
2. It did not really depend on browsers, therefore it worked more or less the same on everything and you could make very good money with CPM Star, distribution was also easier.
It does not seem like you are planning on using ads and distributing your game to game portals so #2 may not matter to you, pisses me off though.