It will still be useful for anything really, everyone will be using your maps in survival it is pretty crucial to be in survival even if it is easy to just not hit space twice, I always go in survival on the parkour when I make a map because I want to know how hard it would be I just do it in survival then if i fall i know that someone will fall there too and they will have to do it again.
being on creative you will have the temptation to fly. Doesnt feel the same either.
the thing about it being a creative server not a survival server is a completely bad point to make, everyone will play your map in survival so.
Your simply testing it, nothing turns out well unless tested for, imagine if you made a game and once the coding was complete you just left it to be played without Beta Testing and Alpha Testing.