Good points EeryPetrol!
To be fair I'm a bit tired of reading the "This game was perfect, why would they change anything (apart from the controls, obvs.)?" comments.
Grim is still my favourite game, it was one of the first adventure games I ever played and stands up so well in comparison to any other game of the genre that it truly deserves this iconic status.
But let's get some things clear: nothing's perfect. Even my favourite thing about this game, Pete Mc's astonishing soundtrack sounds synthetic and grating in a few places with pretty limited compression even on the live recordings. One thing I have always wished for was an orchestral re-recording of the faux-symphonic sections and a remastering of the superb jazz/mariachi/tango themes*. Can't we agree that this will be "a good thing"?
Secondly, the look of the game was brilliant at the time; pre-rendered backgrounds meant no blocky or unwieldy texturing. But adding low res 3D characters/props into this mix did not help to make the game any more immersive. The FMVs did a great job of tying into the look of the gameplay without changing the look entirely (which still gets done today; hang your head in shame, 'Gray Matter'), but the compression, again - coupled with waiting for the hourglass, back in the days we played this on disc - were limitations of the time and really do affect how you respond to the game. If we could see a new graphical interpretation that matches up to the finesse of Peter Chan's excellent concept art then that would tick another large box for me.
Of course, the representation will also feed into movement and navigation: I'm not entirely convinced that 3rd person navigation and control won't work, but I get the feeling it will be problematic in some areas and also Double Fine would probably never hear the end of it from the Purists. Also, if the game is going to be usable on tablets and phones then full on 3D will just be another headache. I have one request for updating the navigation though: as much as I loved the second year in Rubacava, it would be such a relief if there was a mapped navigation system that didn't require having to run through all the locations loads of times to get to where you want to be!
I'm sure I will appreciate the remake in whatever form it takes, after all, these are probably just personal things which didn't bother everyone else. But most of all, if Double Fine can achieve one thing (besides bug fixes of course), like EeryPetrol and other have said, it would be most welcome to let long time fans see some of the content that we were never a party to before and make this a worthwhile investment for all!