Coming back after years into pvp... What happened to the horde pvpers?

Alliance stomp in BGs, went for one of the world drops and it was just like 20 alliance who promptly slaughtered the one blood elf who showed up.

Also why do BGs on horde segregate healers from most other players? I que as resto druid I get put in BGs with like 4-5 healers. I que as feral and I get put in an all DPS team while the allies have a healer or three. It happens constantly.

Last time I played I made an alliance character and I recall having like a 80% winrate in BGs leveling but now that I'm on the otherside its so lopsided. What's up with that?