After you added new gilds, the old ones becomes useless. Old ones gives only 1 stats bonunes, and sum of material required is mutch expensive than new ones.
Fox example:
http://ringofbrodgar.com/wiki/Spun_Gluethread versus http://ringofbrodgar.com/wiki/Fancy_Buckle
or
http://ringofbrodgar.com/wiki/Chef%27s_Pin versus http://ringofbrodgar.com/wiki/Chitin_Sequins
or
http://ringofbrodgar.com/wiki/Patterned_Embroidery versus http://ringofbrodgar.com/wiki/Quilted_Wadding
These examples are useless, worthless. Requires rare, harder to get resources. Little bonuses, that i can easy get from other gilds. (if you want to talk about "use as second" - everyone will prefer take different gild instead so useless second)
I offer relook old ones, before you will add new, for example add additional stats to old ones.
Spun Gluethread can give ua+agi, instead agi only.
Take a look at this shit!!! http://ringofbrodgar.com/wiki/Rock_Crystal