I have no issues seeing the dial either with a full face helmet. Or, well, a modular with a flip-up front for convenience (Nolan N104, best helmet I've ever owned.) 4-star security rating at SHARP, and all Nolan modulars have a 100% front-stayed-closed-in-testing rating.
I crashed fairly seriously in my slightly younger days and landed on my head. The shield on my helmet at the time was scratched all to hell and back, without a full-face I'd have had no face. It's not that great a face, but it beats having a crater where it used to be...