Are there any future regulations planned for electric multi-motor LSAs?
Light-Sport is a category for pilot certification and flight rules. The aircraft themselves are simply part 23 normal category risk classification level one, low speed. 

Part 23 was fully rewritten in 2016 it now describes the desired safety outcome but lets manufacturers develop new methods of complying, nothing is bias against electric multi-motor planes in the new part 23.

The issue is that the pilot must be rated for multi-engine operation and you must have at least a private pilot certificate for the multi-engine rating. Most multi engine training is actually about operating with an engine failure and the associated aerodynamics.