Title says it all.
At the current cost of 70f, and 45G they simply aren’t worth building over Knights or Scouts. When you are allowed to create them they have to compete with opposing Knights, Archers, or TC fire as a Raider. Simply put units that don’t generate value in these battles don’t see play.
If you want Steppes to be a raiding unit, then they have to cost less and or be more resistant to TC fire.
If you want steppes to be a field unit, then they have to create faster, and be similarly as easy to field as a Knight, if not easier.
As of this second Camel’s serve the latter role of Mid-range Field Unit, so that leaves room for Steppes to be the Mid-Range Raiding Unit.
+1 Pierce Armor and either 10 less food OR 5 less gold on the creation cost.