Well, I won't argue with a guru of CivIV -- especially since I don't really understand his complaint.
I will bring up some points about Better AI (BAI), since I've played it extensively for more than half a year. Recently I went back to playing 2.08 to see how it played differently, which gave me a fresh perspective on BAI.
My two favorite things about BAI have to do with the reductions in micromanagement Blake and Iustus implemented.
First, the resource governor (the magic guy who decides which tiles your city population works) is much improved over 2.08, which itself was improved over Vanilla and Warlords. Yes, you may still find the need to manually assign your population, but it will be for rare circumstances and not routine tedium.
Second, the never-used build governor (the magic guy who decides what your city should build next) is improved to the point of usability for non-strategic cities. Yes, it still produces an unwanted worker or fishing boat now and then, but otherwise it can be counted on to develop a city without you having to decide whether you want a Library or Theatre next, etc. I usually find myself actively managing no more than six cities; all the rest I leave to the BAI build governor.
What has been missing is sensible management of the workers, such that they build hammer improvements in cities that are emphasising hammers, etc. This apparently is coming in BtS. I look forward to it.
In 2.08 the AIs focus on commerce and huge cities. They tech rapidly and trade techs with each other madly. Some AIs may do warfare, but they're going to try to win by Space Race. It's one-dimensional.
With BAI, the AIs can and do build production cities (and GP farms too, I think). The AIs know how to go for Cultural Victory and some will try it. (I've been beaten this way a few times.) Some AIs still end up going for the Space Ship, but others take an aggressive approach. (I've never been beaten by Domination, but that might be because I don't play out such losing games to the end.) All of this means a more multi-dimensional game.
I look forward to the BtS AI that's better at using its military and knows how to do naval invasions (reportedly, anyway). This alone will make the game more interesting and exciting.
I wouldn't say BAI is perfect, but it is a big improvement over 2.08, Vanilla and original Warlords. Therefore, I expect that the enhanced AI in BtS will be seen a refreshing improvement for Civilization by the vast majority of players.