To me, less complexity generally means a better design. I believe in the K.I.S.S. principle (Keep it simple, stupid!). It could be that the decrease in complexity is a good thing?
I just started building Technic sets, but I've built 5 of the big ones so far (42000, 42008, 42029. 42030, 9398). I've learned something new from each set and am excited to see what comes next!