Don't jump too fast. Ask the guys at RYR and many will tell you, even senior management pilots when candid, that they are whacked during day 5 ON.
The problem with blocks of 5 earlies or lates is that you lose a good portion of a normal sleep every working day. Over 3 possibly 4 days the accumulation is not too bad; over 5 it hits you. The 3 days off are for recovering and catching up on chores. After a month many admit to being knackered.
Tread carefully. If many at RYR are trying to change their system, why be in a rush to adopt something that others are wanting to ditch? Just because their bad system is better than your nasty one means you might escape the fire but you are still in the frying pan.