I've always found spiking to be a legitimate tactic in Travian - whether Legends, or now on Kingdoms. Spiking is very good for passively taking down opponents around you, and can be near essential to helping you establish control over your local area.
I would not support changes to limit it - this is a war game and we need to play it like a war game. There are obviously some informal guidelines on how to effectively spike as well as some do's and don'ts but all in all it remains a very valid tactic.