I've used most Click products in the past, and never touched them again after finding Construct.
Construct gets new plugins and effects every once in a while that add some features MMF has (eg: online thanks to SciDave's Network plugin), but the built-in ones are still great compared to what a vanilla installation of MMF provides.
I guess you can say Construct took influence from MMF, and then improved on it. The only problem is when you stumble on a game-breaking bug, but most of them can be avoided with caution now.