And why is that bad, +5 attack by Relics was unrealistic in 1v1 even in Arena, and in team games it was just too powerful because was so easy to pass for +4 to +5 Relics and the you had both Paladins and Leitis with 23 attack, only one less than Elite War Elephant, withou looking at their crazy Hussars at that time, but well is a bit off topic.
You should exactly look of why they now cost less and train faster than before: Leitis too limited useful compared to Knight line?
Thanks to him apparently the Leitis is now much more usable than before.