I'm probably one of the biggest Metal Gear fans, but sadly, No. The demo was not better than the whole game. It may have nice graphics and DECENT hacking controls, but it wasn't better than Ninja Theory's great take on the DMC series. BUT, I will say this... I have no doubt that the full game will be a masterpiece and be much better than DmC.
This. A demo can almost never be better than a full game, unless the game is Superman 64 levels of bad. I do agree however that MGRR will ultimately be better than this game. Not much better from my expectations, but it looks like it'll have more variety and be more fun. I'm also a big fan of the MG series. Great stealth and one of the best overarching stories I have ever seen. I love it and Hopefully Revengeance will live up the series' standard of great stories.