I am thinking less on features such as Coop in story mode, there probably would have been too much to be turned inside out and above all the flair and history would have suffered tremendously under.
I found only one should have the opportunity with both hands and grab at least better resolve some inconsistencies. To give just one example: [Spoiler] Among other things a howsoever induced amnesia when Rebecca had done at the end of the plot towards very good because a few hours later they appeared so completely clueless and without any background knowledge in RE1 on where they but unfortunately can play a very passive role. [/ Spoiler]
Also a few other rooms, mystery, background information relative to the GC version, as in the remake of RE1 were determined not to be despised.
Well, that's all not happen ... Nevertheless, because it is a great game, the classic look of RE, I can recommend it to anyone who appreciates a bit calmer survival horror game. But those who have already RE0 as Gamecube version plus a suitable GC controller, it need not take again.