There are a lot of things that are totally new to this installment of the TES series, like puzzles, crafting, etc, and I think Beth made them easy because they were just introducing the concept and wanted to see how we would react to it. Can you imagine if the puzzles got increasingly more difficult and people didn't like them? The entire board would be filled with posts saying "Now I can't even do random dungeons without doing homework or digging around for clues! This isn't a mystery game, it's an RPG! I can't complete all the content without going online!"
Who here remembers the most asked question when Morrowind came out? It was about the damn Dwemer puzzle box, the first main quest item you had to find. Oooooh my god, the anger, complaints, frustration, etc. "Why isn't it easier to find? It's almost impossible without the internetz!11"
So...there's an answer to why there aren't more challenging puzzles in the game
