(actually, probably shoulda posted over in the General forum, but you may get more eyes on this here)
I'll try to be a little more objective in my response, as someone who has actually played the game quite a bit over the years. And yes, I was mostly critical of the game as well. However, I've owned it for years and sometimes played it just for something different - and well, it is very different from IV. I played the game a good bit initially years ago just trying to get into to it and make something out of the purchase, but I have picked it up for a spell now and then, playing the GOTMs from time to time or grabbing achievements.
First off, I'd say without question, if you are looking for the depth of strategy that IV provides then V is not that. In terms of opening moves - builds, social policies, and food caravans -there is pretty much really only one path, although there is a bit of start analysis and decision at Turn 0. Workers are less important in this game and you can usually just steal them from City States or AIs without much of an issue. I almost never build my own workers.
So basically, I treat the game almost strictly as a war game, pursuing fast domination. My decision making and planning early on geared toward disrupting the AIs and taking their capitals. If taken from that standpoint, the game can have some merit. I'd say Deity in no way compares to Deity on IV, but it is not easy either ..the difficulty was improved with expansions.
Not sure the game is necessarily all that more fast- paced. I'd say there is less city micro - although certainly some - but the game gets slower the more armies you have mobile. And how you move and interact with your armies actually takes much more thought and analysis than in IV, simply by virtue of the 1UPT and impact of those units in concert and composition.
Food is also important in this game, but for different reasons.
Anyway, if you are looking for something different, then I don't think it hurts to grab V on the cheap and try it out. All you need to do is read a strat article on the Tradition opening, maybe watch a video to see some combat, and definitely get the EUI mod (Enhanced User Interface), which is the only mod you need.