I take issue with the phrase "less refined."
My palate for RPG's is plenty refined. It is, in fact, honed from 30 years of playing them. And, at this point in my gaming life, I look back at obtuse things like combat tables and THAC0 with total disdain.
It's not that I can't deal with those things. It's that I don't want to. Of course I'm capable of subtracting to determine a to-hit number or looking the result up in a table, but WHY does it have to be that complex? To paraphrase Einstein, any intelligent fool can make something bigger and more complex, genius lies in making it simpler.
At this point in my life, "simpler" is what my "refined palate" wants. In point of fact, I want my game system to be just as complex as it needs to be, and no more.
To that end, I've tried some very stripped down versions of D&D, like Castles & Crusades and Swords & Wizardry. I even pulled by Red Box out of storage to look at. As I found them lacking, I went up the complexity scale. Third Edition went, in my opinion, a little too far. I liked playing it for a while, but there were areas where it got awfully "fiddly."
So far, 4e seems to have that balance of simple and complex about right - to me. Now that it has more options, my only remaining quibble is something of a feeling that classes have been pigeonholed (and limited) more than they were in the past - especially in terms of combat styles. The thing is that I understand why it was done, but it can still be somewhat frustrating at times. But that's a relatively minor quibble with what I think is otherwise an excellent system. I guess there's a couple minor issues I have with how Rituals and (to a lesser extent) magic items work, but nothing major.
Obviously, not everyone sees it my way. Or maybe they do, but those same issues bother them more than they do me. And that's perfectly fine. Everyone needs to find the game that works for them.