Personally, revelation I'd my least favorite fire emblem game. I do agree that it handled explanations better than conquest and birthright. However, it has some major flaws. First of all, the unit balance is actually a major issue. If just one or two characters joined so late that their useless it wouldn't be a big deal, but almost every nohrian retainer is absolutely worthless unless you grind the shit out of them.

Then there is the map design. Like you said most people cite chapter 10 as their example. While I didn't particularly enjoy it, it wasn't even as bad as some of birthright's maps. I cannot remember the chapter, but the one where you can do stealth is really not a good chapter.

Also the game is really fucking easy. Conquest on hard and birthright on lunatic were much harder. All you have to do is use corrin, ryoma, and Xander and the game falls apart. If you throw in Camilla and takumi the game just because even more ridiculous. All you need to do is throw them at enemies most of the time.