I don't care much for online DF furballs either - but in this case I'll make an exception - besides even with a limited afterthought of an offline element - its better than no offline play at all.
I dont get the feeling that their offline gameplay is 'tacked on' anyways..it has a flight training, engagements, and campaign mode from what I gathered - that seems fairly complete to me.
I think their copy protection routine is kinda being mistaken for more than it actually is
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"you know...in the whole, vast configuration of things you're nothing but a scurvy little spider...and that goes for you!...and that goes for you, too!!"
George Bailey