I hate to be nitpicky; but that’s a decompilation, not a demake.
‘Demake’ usually refers to a game that gets remade for a system older (or less powerful) than the one it was released for. A good current example is the in-progress Super Mario 64 demake for GBA.
‘Decompilation’ is where one reverse-engineers a game (or any software!) back to its original source code, or close enough that when you build it, it’s identical to an original copy. So, the goal of the Lego Island demake is to produce source code that can be built into a fully binary-compatible copy of Lego Island, indistinct from what’s on the original CD.
I agree with your statement. However, what I believe the original comment was saying is that if the developers who have lost their jobs were to get together and make a game as they describe, then they would buy it. The malice was directed at Microsoft and so on.
It’s an RPG, of course it does! Particularly if you decide to give your character the ‘Bloody Mess’ perk, which causes every enemy to violently and horrifically explode in a shower of miscellaneous chunks.
Counterpoint: budget re-releases of games (e.g. ‘Platinum’ on PlayStation) were often an opportunity to fix bugs, or sometimes even add new features. A few examples:
Space Invaders 1500 was a re-release of Space Invaders 2000, with a few new game modes.
Spyro: Year of the Dragon’s ‘Greatest Hits’ release added a bunch of music that was missing in the original release.
Ridge Racer Type 4 came with a disc containing an updated version of the first Ridge Racer, which ran at 60fps.
Super Mario 64’s ‘Shindou Edition’ added rumble pak support, as well as fixing a whole bunch of bugs (famously, the backwards long jump).
Those are just off the top of my head. I’m certain there are more re-releases that represent the true ‘final’ version of a game.