I've been skiing in Davos for 50 years. It takes a bit of time to "get" Davos. On your first visit it can seem chopped up with multiple non-interconnected mountains (other than by bus/train or your car). The lift infrastructure is not as modern as many other major resorts, however they seem to have started re-investing in some critical new lifts including the replacement of the Furka T-bar with a new heated 6-pack chair and replacement of the Schaffurggli t-bars at Madrisa with a high-speed chair.
Davos does offer is plenty of wide-open cruising runs that are not normally overcrowded. Experts looking for lots of of steep mogul runs will probably be disappointed. On the other hand, if you enjoy off-piste skiing, the possibilities are virtually endless - hire a guide or go with someone who is familiar with the resort and you will love the place. Instead of being a liability, the separated ski areas actually provide more off-piste options for those in the know.
Lots of tasty food opportunities on the slopes - look for the smaller independent restaurants scattered on the slopes.
Davos itself is more a small city than a ski town. Plenty of things to keep skiers and non-skiers entertained.
