The effects of technologies isn't shown, I don't know if the technologies do have ny effect.
Also, I don't know if it's a bug, but it seems that spanish line infantry can't form square.
"The satisfaction in this game lies in to see 300 heavy armoured horsemen ride chock in an easy snowfall, while fire arrows criss-crosses the evening sky" - Swedish historian and permanent secretary of The Swedish Academy Peter Englund on Medieval 2: Total War (translated by Thrashmad)
"A game that contains both Carl Linnaeus and five different types of artillery projectiles are indisputable exceedingly detailed." - Peter Englund on Empire: Total War (translated by Thrashmad)