The Loyalty merchant is typically updated once a year, during the summer GU. Suggestions/requests for additions are welcome, and the old forum thread has many things that are under consideration. There is no need to repeat those requests.
For new requests, please be sure that you are including proper item names when requesting appearance items or house items. (i.e., don't just say "old battleground plate armor set", but give me the name of the set. If you don't know the name, ask around, and I suspect you'll find someone who can tell you.)
As always, suggesting something will get it considered, but that will not mean it can/will/should be included.
~Mum
For new requests, please be sure that you are including proper item names when requesting appearance items or house items. (i.e., don't just say "old battleground plate armor set", but give me the name of the set. If you don't know the name, ask around, and I suspect you'll find someone who can tell you.)
As always, suggesting something will get it considered, but that will not mean it can/will/should be included.
~Mum