Well- if I were to give my opinion on some of the Tremor gear and what could be done to spice it up, here's what I think.
For one, I'm a fan of Tremor. Undoubtedly, a lot of work has gone into putting out such a big mod with some amazing sprites and code. Though it has its fair share of balance issues, brought to your attention (hopefully) by other members to be fixed in the next update, which mod doesn't? It's definitely hard to balance every item perfectly.
However, there are some things (some simple things), that if done, would really raise this mod another level.
What Tremor seems to be lacking, in my opinion, is interesting weapon and armor effects. While, yes, there are some reeaallyy cool items, like the Sharking, the Swamp Clump, and the Carrow, a lot of other items lack visual effects, debuffs, or other small things that could be changed. For example, a lot of armor sets' set bonuses seem boring, as they're usually just defense or life regen increasing bonuses.
I notice that Tremor doesn't have many custom debuffs. Adding some to be given by, say, the Afterlife Set or the Magma Gear, would make them awesome! Perhaps adding different components to set bonuses, like life steal, certain bonuses in certain conditions, or even custom dusts, it'd be great.
If you'd like any help with stuff like that, including coding, I'd be happy to lend a hand. That's my two cents, expect more opinions in the future. Cheers, and I wish this mod the best!