Yeah their mileage in town does suck... It hasn't gotten any better from 2012 when I drove our first one to now with the 2018. The 2018 is much more responsive though so that's good but does nothing for fuel economy.
Mine isn't loud but I have the GT trim level so it has more noise deadening insulation than the almost base model my dad has which is a 2012 and his is noisier. My dad went to end of the roll and bought a piece of padded commercial type carpet that was great in colour and put it down over the factory black carpet and did a good job cutting it around the seats and tucking under the trim panels / floor boards here/there and that made a huge difference to the noise. He did this when he got it from me (formerly my fleet vehicle for work), so it wouldn't show the dog hair like the black carpet does. Maybe that's an option for you.
To me mine sounds like a buzzing motor with a shhhhhhh type sound coming from the exhaust as I moderately to heavily accelerate as the exhaust gas rushes out the back pipe. If I take off from a light normally I don't hear the exhaust at all and just hear the buzzing of the motor which really makes it sound electric more than mechanical. But this is all probably related to the insulation my trim level has.
It also has blue mood lighting on the ceiling on either side of the DVD screen console. It's different but it's kind neat. Mine is black and not white though...