I don't agree with this at all. Sonic should be a platformer, first and foremost. Interesting and engaging level design in platformers often hinges on waiting and analysing your environment and the enemies/objects inside of it. It's a slippery slope from "you shouldn't have enemies you wait for" to "hold right/boost to win", to my mind. Labyrinth Zone falls under this umbrella. It's definitely not hard or irritating to deal with at all, if you're observant of your surroundings. But again, I realise I'm in the minority here.