I personally think the shiva EX i115 weapons are too easy to get. All you need is the original weapon and 5 stardust which are guaranteed to drop. They should upped the stardust requirement to like 10 or 20. It feels a little weird how fast you can be done with shiva entirely. That's just me though.

The mirrors being an rng drop rate was bad to begin with. I was surprised when they fixed Ramuh's weapon drop but not Leviathan's mirror drop.