Why do you think that is?
-Megaserver / Phasing
--If you're phased with the same people continuously you barely notice. I have never once recognized the names of people sitting around Elden Root from dungeons, questing, etc. Where as I've continuously done so in SW:TOR, it's a nice feeling to know that these people you're playing with aren't just disappearing after you interact with them the first time.
-Too Many Zones/Spread Between Three Factions/VR RANKS
--VR Ranks just-... They can't go away fast enough. They have done so much damage to this game and it's community. Level 50 needed to be the cap and it needed to allow you to instantly enter Craglorn as the "end game zone" with clearly marked and labeled dailies, solo and group.
-Only 5 Guilds/Guild Slots Needed for Trading Guilds (BECAUSE NO HALF-DECENT MARKET/AUCTION SYSTEM)'
--Now, some games only let you join one guild per -character-. The merits of being in 5 guilds at all times can't be ignored, but at the same time there are obvious drawbacks. Mainly to do with guilds having many different necessary uses... For us roleplayers we have our phasing/hub guilds (because of the first issue I spoke on)... It's -supposed- to make sure we're all phased and can find each other roleplaying in cities / the wild /etc. Sometimes it works, sometimes it seems like it just doesn't, yet it still takes up 1-3 (sometimes more) guilds slots. (The Dominion Accord, Covenant Collective and Ebonheart Roleplay (we tried making it one hub guild, but the 500 member cap was easily reached)-... Then you have some splinters like Children of Skyrim and Morrowinds.) Just trying to get and stay connected with roleplayers can fill up our guild slots, leaving us without a PvP guild, a PvE guild, trading guilds, actual story-focused roleplay guilds, etc.
-No Custom Chat Channels
--SWTOR allows you create custom chat channels for everything from an Out of Character chat for RPers to a secret PvP chat for planning strategies, to an LGBT-oriented discussion to a persistent "Trade Chat" where people can say what they're searching (in agony) for at the dozens of poorly stocked Guild Stores.
-Capitol Cities not Given Enough Effort
--Elden Root is beautiful-... on the outside. On the inside it is horribly small and terribly designed. The main level is filled with crafting stations while said stations would, in any other city, be found in special crafting areas... A huge part of this is that Elden Root's two main wings were given to the Mage's and Fighter's Guilds... Terrible decision. The Guilds do not need that much space in an already tiny city.
--The khajiit embassy not having been built for story reasons is understandable, except-... Even Silvenar has a relatively well done khajiiti and altmeri "enclave". There is absolutely no reason for the khajiit to not have a visible presence inside Elden Root. A capitol city of an alliance should reflect all the races within it and draw people in rather than pushing them away to places like Rawl'kha.
...There's a lot more than that, but I needed to say it.