from evidence so far mercedes have maintained their gap to the rest of the field
in 2014 the main competition was between their drivers , but frankly that wouldn't have been the case if rosberg hadn't been gifted a 25 point start , i don't remember a single time when he won a head to head with hamilton ; try formulating a running score for 2014 starting with a win from pole in Oz giving hamilton 25 more and rosberg 7 less and see how the season looks
I am expecting a one horse race with better reliability from mercedes this season ...hopefully much more competition in 2016 !