I feel like they're "about right". You want the endgame to be hard enough where the player has to take some care in figuring out what ships/skills/weapons/hullmods/etc. to use, but easy enough that a wide variety of ways are possible, and especially considering that not all players are going to necessarily invest that much time into figuring stuff out by reading the forums or watching youtube videos or whatnot to figure out the "best" builds. Then of course the carrot later on for more experienced players is the XP bonus, where you can increase your XP gain by fighting more fleets at once, which means that your fleet is either small and/or can last a long time and/or can kill enemy ships very fast. Right now the XP bonus maxes out at around 3 [REDACTED] fleets (against which you'll almost certainly get +500% XP unless you're using a lot of cores) which seems about right.
I think the officers are kind of meh. Sure, they get more skills than you, and they're all elite, but as far as I know they're the same static skills, so you don't have to worry about Radiants showing up with Systems Expertise or whatever. They're not really optimized for the ships they're on. This severely limits their power compared with what the player can do. Also, of course, the player can put s-mods on his ships while the [REDACTED] won't, and all the other advantages the player gets which I won't bother to list here. For me, in terms of the XP bonus, a beta core counts as much as a Radiant (and an alpha core counts as much as [REDACTED BROCCOLI]), and I'd much rather face a ship with those officers than more of those ships. So I don't mind there being a lot of officers in those fleets.
Also, as a side note, for the forums, in general, "how to fight [REDACTED]" is a much more well-studied question than something like "how to fight stations" or "how to fight [SUPER REDACTED]" or whatever else. So it will seem comparatively easier to its difficulty relative to other fights just because there's so much information about it out there.