With 30 years of outlook remaining, I would wonder if it's even worth doing the Roth contributions. Ostensibly, you're able to get an income tax deduction if you had more Traditional 401k/403b contributions, so it looks like some tax savings are being left on the table, by paying 22% marginal income tax now, when instead you could be paying tax on it upon withdrawal in 30 years.
That said, if whether future tax rates will be higher or lower is a question that keeps you up at night, then keeping the contribution as-is is worthwhile. The Boglehead approach to risk tolerance is to optimize but not to the point that it would cause you consternation. That is to say, you are playing the long-game and must make decisions that are sustainable for the long-term.