Mclaren is already trying the Lotus style nose in the wind tunnel. The nose will not be tried in Spain, because of the crash tests. But it is very possible that we will see the nose on mp4-29 in the later races of the year, possibly in June. According to Omnicorse there will be upgrades on the car for Spain, but not so many, as we would have expected. The italians are going for brake ducts with aero purpouses, like Ferrari had in China, but we won't see a complete package (FW, RW, sidepods, floor, etc). It's unacceptable that if after such a long break, they don't come with more slimer sidepods. The suposition about the Lotus nose is based on the large amount of mechanics and engineers that bleed from Lotus to Mclaren since November-December 2013.
http://www.omnicorse.it/magazine/37476/ ... ella-lotus