I am so fed up with cavalry in Siege Mode -- it is a complete farce! Cavalry was almost never used in historical sieges and it turns Siege Mode into TDM and ruins any real tactics because infantry is always getting sniped by ride-by glaives or menavs or lances (often swarming around spawn). Furthermore, cavalry often back capture G and ruin the game for everyone. There are precious few enough Siege matches with a descent amount of people on them and it is ruined by swarming cavalry. If you must have cavalry in Siege Mode then limit it to five a side or 10% or something because it is right out of hand -- and causes me, for one, to rage quit regularly (and I'm sure I'm not the only one, which just continues to reduce the player base.
I've played in several Call to Arms siege events where cavalry is banned and back capping prohibited, and it is night and day -- siege with cavalry is chaos; without is amazing (particularly with Teamspeak for extra tactical play).
I'm sure there will be many who object to this, but I would think there are many more that agree.