Ewan was great but never played off of that idea or even to me connects to Guinness in the OT, for what it's worth Qui-Gon dying kind of symbolizes the dying of what we thought Jedi were based on Lucas interviews throughout the 80s and bringing in more of his newer interpretations of what he wanted them to be with the could Jedi Forces.
Can't say I agree. For me how Ewan plays Obi-Wan and how Guinness play Obi-Wan mesh pretty perfectly. Its one of my favorite parts of SW and why Obi-Wan is one of my favorite characters.