I'm not a rod builder so what do I know? But here's my 02c. anyway
I would definitely be concerned about the lack of flex in the handle and also added weight. It might look pretty but I don't think it will make a practical fishing tool.
There's a reason why cork has stood the test of time. But from what I hear, the good stuff is getting hard to come by. You might look at some of the synthetics but be prepared for some 'funny looks' from the traditionalists