Disagree. Compared to a brand new stadium this is a very poor alternative. That's why it was only proposed once it became apparent the new stadium may never happen.
A revamped AG will never be able to generate the revenue a new stadium would have. On top of that, the new stadium was achitecturally different whereas the redeveloped ground is much more the like the 'souless bowl' we all fear. If we are forced to choose this distinctly second-best option it will be to the deteriment of the club and the city and, for me, will forever be a symbol of Bristol's antipathy towards sport and progress in general.