for curiosity,apart of save rooms in some corners of the maps,¿we have warp rooms to activate when we found it too?,so we can go places like the begining of the game where we need to use the ship where kincaid appears and some warp room near the lake and near the town etc... probably near the bosses too when we only enter it to see is going to be a boss fight and search on the others place to found the save room and warp room near of the boss room to be prepared to fight the boss there.
less backtracking thanks for the warp rooms and easy form to return a place where we need a new ability like in the water level with the pipe.