Exactly. I'm well aware of her damage but she has no safe way of getting them. If you were to try to play Noel as safe as possible your average damage is around 1.2k. Thus, if you want to do damage you have to start guessing, fishing for random 5d/2d hits (and note that 2d is no longer an overhead). Good yomi and IBing helps with fishing for those hits, but at the end of the day, MOST of the time you're not 100% sure that it's gonna hit. That's guessing, that's bad. You could say the same for ever attack in the game (if you're not punishing someone) but throwing out Tsuba's little hand poke (5c I think?) ain't the same as throwing out Chain Revolver. Sure, there's overhead (1) and lows with Chain Revolver, but against DP characters it doesn't make a damn difference. If you fish for a hit with Chain Revolver and don't hit with the first attack, you CAN get reversaled. I don't know why so many people try to block Chain Revolver. You don't have to.
Dacidbro knows, lol. I saw some video with him vs. a Noel player who swore Chain Revolver was some sort of good mixup tool. As soon as you block the first hit, mash dat Daifunka and it's free. Mash guard point. Mash counter. Mash DP. Hell, you can mash Chain Revolver against Chain Revolver.
If 2d was still an overhead it would be a better (Read: still bad) mixup tool, but it's not.
That's how it is.