This is just a short list of some things I think would make good / fun additions. I don't know if anyone has suggested these before; if so, sorry.
1. More achievements! It's been almost a year since there was a single new achievement added. There are so many other possible achievements. Why not add a few more?
2. Some sort of special ability for the knight, which can be chosen and upgraded just like weapons or armor, that can be used a set number of times per clockworks level, maybe even just a single time per level depending on the ability's power. Maybe area of effect attacks, healing your friends, attack buffs, things like that.
3. A shield costume slot! We can have costume helmets and costume armor, why not costume shields? It would make it much easier to finish out particular costume looks while still being able to equip the shield that's right for what you're fighting.
4. New monsters. I'm getting kind of bored, to be honest. I know new monsters have been added into some of the danger missions, but I would love to see them available in the regular clockworks as well. And some new monster classes might be awesome too, but if not, there are so many more options for new types of monsters in the already extant monster classes.
5. New damage types? Along with new monster classes, maybe we could add in a new damage type. This would also allow for diversification of weapons.
6. The danger missions are awesome but what I really wish was if there was some option to add a danger mission into your regular clockworks run. No one wants to just do a danger mission when they could do an entire CW run with their friends, and doing a danger mission outside of the clockworks means you probably won't have enough energy to do a full CW run. It would be really cool if there were some option where if you are going down a gate, you could choose to add in the danger mission. Or maybe do the danger mission after Basil, just like dong a shadow lair. Increasing the crown output for danger missions would be nice, too.
7. Pets. I like the idea of having a cute clockworks animal that actually follows me around. Maybe even does a little damage for you on the side (a limited number of times per level, like the special ability idea I mentioned earlier?)
Like I said I don't know if anyone has mentioned these ideas before, and they are just a few things I think would add enjoyment to the game. If you don't like an idea that's fine by me but please don't bash.
2. Area of effect attacks? get bombs. Attack buffs? make skolver. We dont need more power
4 and 5. Right now resistances/strengths are evenly distributed. We'd need a BIG expansion to keep the same level of balance
7. Buy monster pockets