Let me start with solution for radiant problem. Radiands could be a reward for prestige missions. For example, you could get one radiant for every 5 prestige points (this is only example). Or make radiant crystal recipe.
Next thing is of course gunner update + new missions.
Then you should make new dlc(s). (You could also make sparks of life drop more often.)

That's it for now. If i'm wrong or if i forgot anything let me know
;)

Some new Swords. (Like we need them)

Aero Edge.
Spur->Arc Razor->Whirling Slasher-> Aero Edge

Whirling Slasher (Does elemental damage)
Desc: This windy blade will blow your enemies away!
Ability: High speed slashes.
Charge: Rather than a disc it launches a gust that pushes enemies back. Minimal Damage.

Aero Edge (Does elemental damage) (Small Chanc of Light Stun on Charge Attack)
Desc: A high speed blade infused with the power of the wind, it's so strong it will BLOW your mind.
Ability: High speed slashes, small gust on each slash.

Many of you know of the various brandish lines, but no one would ever create a cautery sword.

The cautery sword is a 3 star normal damage brandish with a damage bonus vs slime high.

With this boost it would seem a good weapon for the Sovereign Slime mission. It's damage is comparable to the nightblade, but with it being the end of it's short alchemy path the nightblade outclasses it.

The only reason to choose this weapon over the nightblade is that it lacks the penalty to the silkwings that live in the Sovereign Slime mission.

Problem: It's a pretty well known "word of mouth" fact that a level 1 5* weapon is weaker than a level 10 4* weapon. If you did not know this, blame OOO for not warning you about this damage reduction risk when "upgrading" your 4* weapon.

What's lesser known is "what level does it take for a 5* weapon to catch up/surpass a 4* weapon?" The answer is not pretty. The gist is that this cut off point varies by depth, generally somewhere between level 8-10, where the cut off is at a lower level in later depths.

I think enemies should drop furniture (rarely) and there should be a greater variety of furniture available. Tons of furniture to be purchased at the emporium.

Swiftstrike buckler is loved and I love it too but it's sad that such a powerful shield goes to waste cause the shield only has a 3* version add a 4* and 5* version

So my suggestions would be adding:

Water:"Again that water!" would be the reaction that the knights would express becoz:
Water would slow you down by 15% noted by a effect called "Wet!"
Water would slow you further the deeper you went in going like this 15% - 20% - 25% and would finnaly stop at 30%
A good thing about water is that enemies are affected too,Constructs wont enter water becoz they would rust and Explode...so they wont enter!

Bad Water imagination on aurora isles :http://s28.postimg.org/dctbhngy5/Untitled.png

Lava:Entering it would inflict you with fire + wet!

I got 4 five star weapons and 2 five star armor most of the stuff is only at level four mostly cause of double level ups
there are 3 solutions to this to increase the radiant drop chance, to decrease the amount of crystals needed and to remove the forge entirely

So i have had seen problems within the guilds i have been in and came up with an idea, Inter-guild LD where Guild teams can directly fight each other if theres a dispute within a guild. No sitting and accidently being put against another team, (im not sure if guild teams can fight each ohter right now anyway.) They get to kill each other right away, and it wouldent have to be full teams of six, just as long as the team numbers are the same. And if that dosent work, theres the choice of inter guild blastnetwork.

I feel like there is literally no chance of getting the darkfang, or any other items out there that are only available via gear drop, now that the chance to get them is even lower than it was when the elevators cost energy.

Not that there was a huge chance before. Just a glimmer of hope that is gone now.