Back then there was no background to work on. So, mostly the methods that will develop would have been somewhat incorrrect or correct outright. We have settled down to UF/UFR after some iterations of thoughts and pro-cubers discussion.ple of a 4 move set up and [U R' F R,D' R D R'] is a strange comm I don't understand. You can find list of these speed optimal comms in spreadsheets bestsiteever.ru has a list of links to them. Those are from Daniel Lin's list. Learning from these lists is fine if you understand comms for all of 3-style. Doing it completely intuitively leads to slow comms.
I feel like move optimal was focused on back when this was first published. Not
The reason [R F' R' U':[R D R',U2]] comm is better than the move optimal comm. is the same reason CFOP is better than any other move optimal method like Waterman and Roux. It just that regrips is a big thing when it comes to accelerating up the execution of the solve.