Depends on where you are in a stadium. From some positions yeah you get a better look, from others you certainly get a worse one.They do.
You see movement off the ball, you can watch a player, note a lack of movement or runs made, space.
Most of what you see doesnt come down to angle though but to the spectator.... sometimes if I write something nice about a scapegoat or something slightly negative about the teams new Champions League-carrier, I get the comment "but you weren't there". As if I'm supposed to pretend that people with two modes - "everyone/"everyone, especially xx were shit" or "everyone was top 4 here we come" - actually sit and track off-ball runs after a few beers in the stadium.
Often forgotten is that players, managers and refs got the worst view of all. Spaces, free players and incidents are a lot easier to see for both tv-viewers and almost everyone in a stadium compared to the view on the pitch.