This post is so contradicting. You are 100% right, people don't have a problem understanding pants. So therefor the removale of pants was not to "dumb" the game down, but because Bethesda saw them as pointless.
Like the whole spreadsheet arguement. Todd never said it was removed because it was too complicated for people, he said it was removed because a great majority of people who played Oblivion and Morrowind never got a character past 2 hours because they would remake them over and over trying to find a powerbuild. So the removal of the traditional class systems wasn't to "dumb" things down, but because Todd wanted the focus of the game to be on the story, not a spreadsheet. Only people saying the game has been "dumb" down are those who are mad because things were removed. Doesn't mean it was meant to dumb the game down, just that Bethesda decided to do something different.
My, don't understand pants was an joke

) but I do not see them as more pointless than having separate gloves or boots and having more game impact than character customization as it affect enchanting and armor stats while the customization is just look.
And yes it was probably done for two reasons, less objects on screen for consoles to handle and making it easier to design outfits as you don't have clipping issues at the belt.
For the classes, the increase attributes then leveling up has never really worked well. This was pretty visible in Oblivion, Daggerfall and Morrowind had unlimited training and was easy at high level but in Oblivion enemies continue to grow stronger while weapon damage was limited so you wanted +5 on level up and this took focus from gameplay.
Miss attributes but don't see an good way to put them inn.
For spellmaking, yes magic has become less spreadsheetly, it has also become much less interesting as you only uses a couple of spells doing unimpressive damage, while the fancy spells like runes and firewall is pretty useless against higher level enemies.