2014 is first, last and only year of the LMP1-H and LMP1-L designations for the main category of FIA WEC. For 2015, the main category will be back to the name LMP1, involving both the manufacturer and privateer entries.
The reasons behind the decision, according to ACO's Vincent Beaumesnil, was to make it clear to all parts that watch the FIA WEC that hybrids and non-hybrids belong to the same category, given the fact that the non-hybrid privateer entries should have condition to fight for overall victory.
In 2014, while the hybrid manufacturer entries received the addition of Porsche to the grid with two cars, the privateers saw only three entries at the moment. The LMP1-L cars received performance breaks after the 24 Hours of Le Mans, but still they are a little bit away from the fight for the win.