Around my way the Asda/Tesco/Waitrose/Sainsbury all have gone down the mega size warehouse model where they deliberately place the everyday items at the furthest distance from the entrance. When I go shopping I don't feel the need to do marathon distances walking around shelves.
The Lidl/Aldi model so far seems to have been to open much smaller shops where shopping can be much quicker. I have noticed however that the 4th Lidl currently being built local to me looks to be about twice the size of their other shops - although very much smaller than the traditional main supermarkets.
As for hiding things, my mother's main complaint about Asda is that they keep moving the location of items around the store. Go in one week and an item will be on shelf X and the next week on shelf Y. It's another of the retailers policies to send you down more isles and past more goods. My Aldi/Lidl stores always keep the same items in the same place for years on end AND in different stores of a similar size you are likely to find the same layout of goods.