> there are so many special pieces that it does not spark your own creative fantasy (in my opinion) but limits it.

Those pieces aren't anywhere near as limiting as you think. The Saturn V model uses the 64951 tub/barrel pieces as thruster nozzles. The LEM uses the 64644 telescope/spyglass piece for the legs. That's the immediately visible bits in the model I have handy, I remember seeing a bunch more of those on my friend's Millennium Falcon, and just in general.