This is close to how I feel for me it...
1) Annoying slog to reach the raid where inevitably 1/4 the party pikes
2) Stupid BTC mechanic for essences means filling roles difficult... e.i. Once you have your Tier 3 on a Cleric or Caster why go back. Essences should have been BTA and Cells BTC.
3) Boring quest design
4) With 20-25 releasing in a month are they going to be totally obsolete