Personally, I didn't see many problems with QuakeNet. I [personally] was never netsplit, and had a lot less lag (as per the lag bar in mIRC) than I do now. I also liked the L system.
However: I did not know any "opers" or whatever they are, I to this day don't know what they were, and just because I didn't have those problems, doesn't mean other people didn't.
In any case, I trust my admins that the new way is the better way, and it's not too bad. Besides, how much work does it take to switch to a new server? Sounds like it's much easier said than done =]
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