Difference between S4 and 5

I gotta give insane credit to these actors, they don’t look a day different. You’d never know there was a 7 year difference between season 4 and 5 if it didn’t say it. However, I just started 5 and I’m really not into it. They should’ve just ended at 4. Maybe it gets better?

Edit: Does anyone know why they decided to do a Season 5?