As I play as a scout, more and a rogue, I will allow myself to express my opinion on the subject - katana and dagger.
So, changing anything will destroy the current balance, which in my opinion has been the most stable for several months. Katana is better than daggers on r/wd and r/s, and at the same time playable on the rest of the combinations. End of story - it doesn't need buffs and combos because it will exacerbate these two classes. As for r/wl, r/w, or r/m, which are supposedly so powerful, yes, they are strong, but r/wl performs best on Nom, WB, and that's where its power ends because it lacks AoE damage (except for one skill). Therefore, this class is unique.
R/w, supposedly so powerful - take classes that are typically strong in AoE (s/m, b/r, b/ch) and see how well r/w will perform - it won't impress you, and it will even look like a support class. R/w can wreak havoc when it has time to unfold, but when it doesn't, the class is at least good if not average.
Just as katanas, daggers also have their place in the game. Don't impose katanas on all classes just because you want to. Diversity has its benefits. No one forces a gun on scouts, and it could be done (I won't comment on bows and crossbows because they are rotational weapons, and in most combinations, it's good to have both a bow and a crossbow). In summary, the katana is strong, and it seems well-balanced. It allows achieving powerful results on r/wd, and with perfect gameplay, it's not much weaker on most rogue combinations.
Is anyone force you to play with katana, i guess no... , but right now, we have a situation that katana is weaker than daggers and there is few reasons why:
- n% of elemental damage depending on your tier weapon; (and its stable,
when with katana, you need to stack first to get 6% damage). But, as ItemPreview says new Orkham sets will bring to us a new benefits and one of them will increase main hand damage depending on tier, if you wears katana or only one weapon without off-hand. - Off-hand with The Murk gets 0.5 attack speed with a couple of buffs, like Warp Charge and Stimulator or Elven Agility. Now with this benefits lets take a look at Rogue/Priest with defferent weapons. The damage dealing by R/P is mainly affected by main hand and if you wear a katana your Sinister Methods will deals less damage then if you wear daggers, because with daggers you deal double hit from main and off-hand, since The Murk has 0.5 attack speed you deal more Sinister Methods then with katana. Same as on Rogue/Warlock with white hits.
- Off-hand damage scaling. Katana has own off-hand damage scaling that not affected by runes and titles. It means that Rogue/Warlock skills like Soul Extraction and Life Devourer deals more damage.
- Stats....
So, there is only one suggesiton before Orkham will come, increase the damage dealt by bleeding from a katana to close a gap between white attacks.