Not sure If it was intentional or not, but the supposed 2/3 of the time ender pearl trade on expert level clerics has been removed, they always have the glass bottle and turtle scute trades. I have first realized this on an smp while me and my friend went through about 7 clerics, none had the ender pearl trade, and then tested it in a new testing world, 3 times in a row, no ender pearls. So one of three things is happening, this is a 0.001693508 percent chance coincidence, there is a bug making it so cleric villagers don't have ender pearl trades, or there is intentional.