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I agree with sean, i think a cleaner straighter illustration would suit the modern identity of architecture firms. However, i like the softness, it brings a bit of organic/nature-ish fell into the not as eco-friendly "techy" business. I would play between this two ideas.
Also the font reminds me of a 50s swing show, again i would think between the two forms, organic, and clean/modern IE: sans serif/serif
I think you have a great start and pallete, keep going!

Thanks Keli..i wish if u have given me ur vote :)