I have been playing with a new extension (based on Salvager) for a while. I have not shared because it was a bit full of bugs. There are still a few that remains, but at this point, I think it is something workable with others. The idea is: whenever a game starts, open a new browser window with an Iso-like interface and replicate everything done in the actual game. That way, the game play looks and feels like playing on Iso (minus the lobby, for now at least). It would need some tester/developers (it is not ready for just testers yet) to fix lots of minor things that annoying to solve by testing/reporting/solving/retesting.
Features:
* All cards in the Supply displayed on a single "page" (i.e., there are no pages).
* Plurals spelled correctly (I think).
* Rollover miniature cards to see their full version.
* Iso-like chat in the same window (courtesy of Salvager side-chat)
* Look-alike font and colors (I am not sure they are perfect)
Missing:
* Finer autoplay (currently, it only auto-plays Treasures with the same algorithm as Goko, but only autoplays other things when they are forced trashing from hand).
* One or two images for Guilds.
* Older text-only mode.
* Looking through discard Iso-mode (now, you have to go do it in the Goko window).
* Stability issues (it hangs once every ten games)