Of the Warframes I am familiar with, Exalted Blade, and Mesa's Pew Pew Pew are still very powerful, with the main difference being that my Rivened Dragon Nikana now does comparable damage instead of just falling off completely beyond a certain level/armor value. I find Valkyr's Claws, Ivara's Bow, and Titania's Guns generally lacking in damage potential; An argument can be made that Valkyr becoming invincible for her Exalted weapon limits the amount of damage they should be able to do, and I have long been in favor of a rework divorces her claws from her invincibility. I would like Ivara/Titania to be more powerful, although they are perfectly fine for the level of challenge you normally encounter in game. I don't have.. Barruk? Barrock? PaciFIST-Frame to really comment on him...
Focusing on Exalted Blade; Nikana does very good damage, especially with its' charge attack since the overhead swing often lines up for a headshot doing meaty damage. Exalted Blade still has tremendous crowd control, damage, and healing thanks to the synergy between Chromatic Blade, Condition Overload, and Healing Return. The attack animations are also much more fluid and is able to transition from standing to movement and everything in-between much better than Nikana or most non-EB weapons can. It obviously has a massive range advantage. Energy Consumption concerns are mostly mitigated through an EHP/Armor build with Hunter Adrenaline. I rock two Arcane Grace on top of this, so I expect my perspective on that con is divergent from most people who don't have them, although I don't really think they are necessary either; Healing Return and my cat do most of my healing.
The build in the video is not bad, although it appears to be missing a core understanding of Condition Overload: He appears to be using corrosive exclusively and would find his damage ramps up much more dramatically with another element like Heat which reduces enemy armor by 50%, stops them from attacking, and takes advantage of Condition Overloads damage bonus by adding in another elemental source; All this would require is a color palette swap to the heat element with Chromatic Blade. At 100% status chance it should be trivial to proc everything the Exalted Blade can do, so it doesn't make sense not to capitalize on Chromatic Blades unique synergies. Un-optimized condition overload aside, he is still doing tremendous damage in his own video and I can't help but find the formatting suspicious. For whatever reason he demonstrates the Exalted Blade by swinging it once, very slowly, at a level 140 Heavy Grineer Bombard and still takes off 3/4th's of its' HP in a single strike; If he was attacking at a normal speed like any other person in the game would be doing those enemies would be melted faster than he could make his argument. Meanwhile he shows the Nikana being played normally and it, unsurprisingly, does very well. Aside from this there is nothing else in his video that really demonstrates his argument; He simply states things and then expands upon them as if they were true without actually proving his statement. Add in a click-bait title and you have pretty unconvincing argument of buffing something that is already monstrously powerful.
As an Excalibur Main for... awhile now, I can't agree with the argument that Exalted Blade in particular is doing poorly compared to "normal" melee weapons. My Dragon Nikana is dramatically more viable now, and is perfectly serviceable in high level content. That said the Exalted Blade has so many utility advantages that I still consider Nikana a back-up melee weapon for when my energy is suddenly depleted rather than a preferable option for all encounters. Exalted Blade already does so much damage that buffing it further seems laughable, although ultimately meaningless; It's not like one-shotting enemies harder makes them more dead after all.