A simple ceiling generator can fix those few issues, if one can't be appointed, the state will assign an invisible coin block roof. I'd think we should stray from changing the way any blocks act, it could have more effects than one you know, especially in a hack this cluttered.
I don't care if people want to just fly over the level, if they want to just waste their time instead of playing the game, I say go for it. I won't see it, I honestly won't care. The only reason I ever got rid of flying was b/c I didn't want to spend an extra hour drawing player GFX for flying (putting that in there before anyone says "then why you disable flight in all your hacks???"
If they get stuck, it is because they are stupid enough to try and fit themselves into that small hole. If they do that, they probably deserve to reset the game, then they'll think for once...
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Completely useless thread nowadays, but I guessed this was a better place to ask about the "floor" generator for water levels. Is that implemented, or are we leaving our poor, you-deserve-it-for-swimming-under-everything, players the ability to get stuck in landmasses?
In my opinion, breaks are okay unless they do one of the three:
1. Screw up the overworld (allow you access to an exit that you were supposed to grab a switch for, thus messing up the order of worlds)
2. Screw up the story (trigger a cutscene that is not meant to happen until a while later, or skip a very crucial cutscene
3. Break a puzzle level. Puzzle levels are meant to be solved using the mind. Skipping a puzzle is like getting an automatic 100 on a math test.