Lotus are currently restraining themselves to develop a traditional aero package without taking too much risks. Because the team has quite some catching up to do, copying other solutions is the easiest and quickest way to move forward.
The new Bahrain package includes a new front wing with an additional central element, copied from previous Toyota and BMW Sauber cars. Only in the central 15cm of the rear wing, it is allowed to have more than 2 elements in the rear wing, and so an additional element is added to create drag or generally increase the efficiency of the rear wing in that area.
Additionally, an extra slot gap is added in the lower element of the wing to prevent the lower airflow to detach from the wing elements at higher speeds - or steeper angles of attack.