on 7 score
They don't try to make game that are seven, their process only allow them to reach this score (at least in the past). Ubi has been championing rational game design, everything is measured (how many pixel it takes on screen) and competent people are actually hired for well covered task (UI, ergonomy, architect, etc...). The result is a polished but soulless game that generally lead very quickly to franchise fatigue (prince of persia or splinter cell notably). Their game are generally reaction to a trend where they offer a unique take on another game (prince of persia button mapping mirror zelda and expend on some concept of this game) which lead to an initial success. However they failed to keep iterating on that success (until ass creed) and the brand tank while the inspiration continue to thrive (metal gear).
I thought what happen in asscredd was well known
but the game was an empty sandbox with almost no gameplay until very late in the project, a lot of wild but failed idea about social stealth, a very smart animation system for the time and a novel navigation system. Desilet is more in line with immersive things like dear easter and was actively trying to combat traditional "silly" convention, he push really hard for integrated and diegetic interface that make sens (the animus is an excuse for gameplay limitation, the button are mapped according to a puppeteer metaphore of head, hand, feet). They were left to their own device, certain to do something sensational but failed to find the structured fun. When the head of ubi learned about what they are doing it was too late to plug the cord and failure to provide a working game led to tension. Ultimately they send someone who push the final mission structure in 3 month before gold (hence the repetition). The game was really well receive and has a distinct personality with truly competent art direction. Desilet was pushed on the sideway until he left at the end of ass 2.
That's more or less the story