I like the idea of having UU with unique gameplay.
But the SR is just off.
It combines too much aspects.
In AOE2 you can never have everything.
Cheap units?
No imp armor e.g.
SR has not only the dodge mechanic which implies that it is thought as a agile/fast unit, also its moving speed is set to a stupidly high number explicitely.
That is just wrong and feels wrong.
The fact that the mechanic also applies to any attack makes it even worse.
Probaply the worst thing is having them in your eco.
You can’t catch up, your TCs will do less/no damage.
Bonus: Want to counter them with cav?
Already have stables and blacksmith upgrades for camels.
I see too few drawbacks for that much speed.