You can hate me all you want but anyone who played Old AV can not deny that if there is one thing that we can look at objectively from Vanilla WoW that was better than it is now, it is Old AV from Vanilla. The entire battleground was based around this huge war effort that had mini battles in different parts of it, you had your druids and rogues trying their best to sneak behind enemy lines trying to cap towers effectively and trust me (I mained rogue), those archers were quite annoying sometimes, you had to figure out all of the hiding spots.
You had your stalemates at SF GY where the battle generally held there for awhile, then you had your 2 commanders (1 on each side) that still exist today but they were much more important to kill back then. If you weren't level 60 then you could help the war effort by farming wolf skins in the back and getting the riders ready and nobody can forget BOB (that's what the huge Horde elemental was dubbed on my server) or whoever the Alliance one was. Blizzard changing it the way they did just didn't feel right, the battleground wasn't based around a fast zerg up the middle, it had other things you had to deal with to help the end result and it was satisfying.
If you wanted to play something more fast paced you had two other BG's back then that had that feeling, why did Blizzard change AV? What was so bad about having battles that lasted days (weeks on some occasions)? It's not like you actually had to stay in the battle overnight, you would join back in the morning and proceed onwards. If I had one good thing that I can without a doubt tell you it's not nostalgia then it's Old AV.