I am confused on why everyone is so angry, This is the normal progression with expansions.

Add expansion make all old content a joke to do / get so people who actually wanna still / need to do it can with ease since most people are not any more. This same argument could be thrown around in the terms of "Well I had to run X raid over and over to get X set of gear but now that you can lvl to 60 a group of 3 people can run in like morons and get what i had to work for."

if anything as it has been stated the hard core pvp community should take this as a small blessing you reel people in to do a few matches with low cost old gear so the 30-40 min Q times dont seem so bad when they only need to do a few frontlines and then hey turns out they really enjoy it and continue. Sure this wont be the case for a majority but if this change even brings in a few hundred more people on each data center to do PvP more frequently its a win for everyone.