Well I saw quite a few people riding arabians today. Lancers. So plenty of people apparently. The cav I know are largely dedicated mains and I know exactly how most of them are built. So yeah...
Funnily enough I was the only HA on though that was riding a courser. The rest were on rouncey, destrier or steppe. So your theory is apparently wrong.
I've been on and off eu_1 since the update and haven't seen a single arabian lancer.
See how speculative evidence means pure shit?
The fact is, the vast increase is unwarranted - it was not unbalanced. The fact that you need 2 more riding skill for the arabian than you do for a 65k plated charger makes absolutely no sense to the games mechanics. This means that any HA who builds for the arabian now has a +2 riding bonus when using a plated. That's a fucking retarded reality.