The WAP5 is the way going forward for IR. It already has many features that are required for passenger locomotives. With the new software update, it now has more than 6000HP in power.Given it's small and light weight design,beyond this, it is better to use twin-unit locos or push-pull arrangement locos for higher power than using a single-unit locomotive.
More experiments and modifications need to be carried out on the WAP5 design.