I agree with kens88` I'm the handyman for my family and friends, and it is a royal pain when the embedded stuff gives problems. And they will at some time with the wearing out of plastics, valves, rubber, corrosion, etc.

I actually think costs are the same. Changing the whole exposed set in 10 years vs hacking and replacing some tiles and the individual shower items in 10 years? Don't believe there will be much difference.
The exposed items may be considered uglier, but then I personally do not find it so. Beauty being in the eyes of the beholder and all that....