With all due respect to the 'Janus-era', this era [if we had to name it after the most skilled debater, it would be the Advent-era] relies more on fact and evidence than on personal bias. Some of the debaters back then admittedly despised Sidious to the point that they would belittle his achievements ["he was the benefactor of circumstance"] and his power ["Dooku > Sidious"]. Y'know, stupid stuff. Then, they would proclaim that Ragnos could waltz through a gauntlet filled with the likes of DE Sidious and NJO Luke without all of his limbs and effort.
Unfortunately for them, some of us have compiled an arsenal of quotes, sources, and evidence to use, that they never could refute. So, rather than fight it forever, some of them accepted it: Nai Fohl, for example, who was one of the more prominent of the anti-Sidious, pro-Dooku, pro-Ancient Sith types now accept that DE Sidious is - at the very, very, very least - one of the very most powerful Sith Lords in the saga. Then, people like Lightsnake managed to point out that the Ancient Sith uberpower primarily stemmed from their Sith technology, and without it, they resort to hurling bricks. Sidious, however, never relied on technology and such to enhance his power, so he is naturally more powerful than they are. Canon quotes in regards to his strength in the Force are much more abundant and plentiful than those for the Ancient Sith, which allows us true logicians to make a much better argument.
In conclusion, with the exception of a few, the Janus-era debaters were only good at bashing their opponents into submission and belittling the accomplishments of superior powers. Not actually arguing their point.