Death is the great equalizer. Doesn't matter if you were Pope, Bishop, President, or bag boy at the grocery store. Everyone appears before God "naked" as it were, and he'll just be "Richard". We know that those in authority and influence (even if he didn't have strict authority) have more room for mistakes, and that is why we pray more for priests, bishops, and popes, since they're more in need. Bishop Williamson had received many talents, and he'll be asked to show a greater return.
I recall when Wojtyla died and all the Novus Ordites were declaring his immediate entry into heaven, saying things like (Groeschel of EWTN), "I'm praying for him but not too hard." ... meaning he felt Wojtyla had passed straight into Heaven. We don't pray for Popes, Bishops, etc. because we like them, or think they were "nithe". Nor do we NOT pray for them (as Groeschel) because we've DECIDED that they were holy. At the end of the day, we do not know what goes on in any one's internal forum. So let's not be complacent for that reason either. People might consider the Popes and Bishops lucky to have SO MANY praying for them, but that's only right since they had the opportunity to influence (and harm) THAT MANY MORE people, and they'll be judged for anything downstream that they were accountable for. So, for instance, Bishop Williamson, to some extent, will be reponsible for any priest that he ordained and anything he did, such as, say, etc. Thus the higher up you are, the more in need of prayers you are. So we should pray fervently for Bishop Williamson, for Richard.