DAoC came out in 2001, it didn't have the advertising budget that a game like WoW had/has. People also were angry when ToA came out because it took too much of the focus away from pvp. You had to farm scrolls, get artifact credit, lvl your artifacts and do master lvls. Plus it took a hit when WoW came out.
A lot of what people are mentioning in here and what the polls reflect are things that DAoC already did and did well.
-Open World pvp: They did this extremely well, battle for keeps and towers to gain control of Darkness falls and open up your enemy's relic gate to steal their relics. Something to fight for.
-Open World Epic Mobs: There were plenty of epic mobs in the frontiers that you could take groups down to go fight while having to deal with the fact that at anytime you could be ambushed by your enemies.
-Guild vs Guild: People forget that DAoC had pvp servers were this took place and they did it well. On the pvp servers you could group with anyone from any realm(faction). It worked because your guild had to have guild bounty points to hold a keep. They received these points by their members killing players, taking keeps/towers etc. If you maxed out a keep to lvl 10 you would be spending a lot of points each hour to hold this keep. So no guild could fully dominate every single keep/tower in the frontier it was impossible. Plus it would have just been too much to defend. There were large guilds but they by no means dominated the server, it wasn't like you only had 3 large guilds, one dominating each of the 3 frontiers.
Finally DAoC's pvp wasn't amazing just because of the mechanics but more so for the pride you felt for your realm(faction). When your frontier was being attacked to the point of the relics being in jeopardy, you dropped everything to defend them. You absolutely despised the other factions and their elite guilds(Which you could always spot because of their guild cloaks and the fact that DAoC let you color guide your character however you wanted). You could be in class and jump on the herald to see who owned what keep/tower, Darkness Falls, the Relics.
The guild pride in DAoC was outstanding. The herald told you which guild gained the most realm points per week, it also showed you which alliance did as well. I was in a small guild so my favorite stat was against all odds, when our guild hit #1 on that it was truly great.
I have never played a game that has made me want to work harder to help my faction achieve dominance like I have in DAoC, if you never got to experience this game I am truly sorry. If SWTOR can take even the smallest bit of what DAoC did right, it would be a win in my book.