Red Bull is indeed looking quite dangerous. Just shows the team (plus the +300 million they spent every year alongside the big teams) they got, that they can jump back after such a disastrous pre-season.
Traditional team like Williams getting back from the horrible state they were is nice to see. Also, you got a love their classic Martini livery.
Hopefully the likes of Ferrari, Williams, McLaren will improve so Mercedes wont just run away with the glory. Lotus is unfortunately so much back that they have no place anywhere near the top for a long time. Ferrari stole much of their top engineers (
James Allison, Dirk De Beer and McLaren got Boullier as their racing director) and they simply don't have the money to compete at the moment.
They would need to pull out some kind of Brawn GP level of engineering miracle from the car. Problem is that they don't have Brawn or any high ranking F1 car designer.
http://grandprix247.com/wp-content/uploads/2014/01/Martini-Williams-640x424.jpg