That may indeed have been the case. Though I am not really sure what else they expected? - It's like saying "too many of the OCUK Forums have the same moderators, too much power!!!" Of course multiple different forum sections have the same moderators.
"Too much power" over whom exactly? There are alternatives to reddit.. people can even create their "own" reddit if they wanted to and wield their own "power" as much as they liked.
I think you’re completely missing the point here. The analogy is poor, OCUK is run on behalf of a single entity with a single mod team.
The issue the poster is referring to is re: different independent forums set up for different purposes often by different people.
There is some feature whereby the mod accounts being inactive for some period of time allows for others to take over forums on reddit, some people have used scripts to do this... so people with no previous interest perhaps even in the content of the forum. Perhaps they really like moderating stuff as a hobby or perhaps they want control/influence over a bunch of forums for their own purposes - whether that involves making money, influencing an agenda etc...
It’s not necessarily very good for the forums themselves - imagine the sort of inbox/set of alerts etc.. one of these super mods who just likes to moderate (cos he’s a bit obsessed with reddit) will have, probs not much time to look at context, posting histories of the people interacting etc... for example say a Brit tells an Aussie, jokingly “bloody immigrant, too many of you lot in London, why don’t you go home”... obviously out of context and at face value that post would look very racist, so super mod skim reads and action is taken... onto the other several hundred reports... The mod perhaps doesn’t interact much in the community and isn’t really a part of it, because they moderate so many forums.
Now for the people doing it because they have some other purpose beyond just being really keen on moderating as a hobby... well they could end up shaping a forum towards their views, censoring things they don’t like, promoting things they do like etc...