An interesting solution - I wonder if it's a Renault system or a Red Bull Engineering one. It does mean they're a bit vulnerable if the Mclarens can get close to them.
It is interesting, it makes sense if you are always expecting to be at the front but if they are behind at any point where the overtaking opportunities are small then a team with a full kers system can block very well.
It'll be interesting to see how they play this one out over the course of the oming races.