I'm not saying EE2 was bad - it was a blast. But you're crazy if you argue it didn't provide for capabilities that rivaled, if not surpassed, Creative Mode. Given that this was the point of the mod as stated by the devs, I'd say it's a reasonable statement to make.
The key difference here was that you got to where you were via a series of steps that the mods intended. EE2 made it a different game, and EE2 was actually a pretty fun mod! The problem was it was then paired with IC2 and Buildcraft by a certain group of popular modpacks and these intense (and intensely stupid) arguments came up about "balance" like somehow there ever was an absolute balance that could be referenced.
it was not EE2's fault it was easier to amass resources with. Nor was it IC2's fault for being a longer track to infinite resources.
When people use "creative mode" in the context you used it, it's pejorative and dismissive. You may not realize this, but it's part of a huge ongoing argument about the definition of "OP" that sluggishly swirls about these forums.