What do you perceive as having happened to them? The last update to Blessed Water increased its base price from 100 to 250 but the per-day increase was lowered from 4 to 2, so it goes up at half the speed it used to over time.
It takes 75 days to reach the intersection point where the prices match at 398, at which point every day after that it will cost less than it used to. This should result in a smoother curve of usability, since Blessed Water is more useful later than early on, when you've gained a number of willpower maluses.
The old way, it would reach its current base price around day 39 (when the new way it would cost 326), but then it costs close to 500 gold on day 100 (we'll use that as a benchmark since it's when demon generals power up).
Ths new way, it starts at 250, but then by day 100 it only costs 448.