I don't see any problem whatsoever, I repeat, whatsoever, with upgrading the graphics and, therefore, requiring a modest computer upgrade in the process.
I say that in the knowledge that AH2 currently has fairly low-end computer requirements to run. Extremely low compared to other "modern" games/sims.
Having said that, if the new version allows for users to turn off "eye candy" without affecting gameplay, on their end or their opponents' ends, then this would be win-win.
Graphics don't make the game, but they aren't completely unimportant either.