Yeah, you definately made the right choice. It's far more accessible for someone like yourself and as others have said, it'll only get better with patches.
IMO, Civ5 will be the best in the series eventually. The combat side of things are much better and already the first big patch has started to help with non-combat stuff. One unit per tile in Civ5 is a huge improvement alone, way more tactical. AI is the biggest weakness however, but has been for the whole series, espescially when first released. I'm confident that will get sorted out soon enough though, via official patches and mods.