First and foremost, I think that because of the battlemap and the way the powers work, 4e gave us newcomers the impression that it was more of a tactical wargame than anything else. Although roleplaying did happen, it was sparse and squished between large segments of combat. Having played 8-10 sessions of 5e with a small party (only the two of us with a sporadic third player, but better than just me) the roleplaying feels a lot more intuitive, and it feels like the system encourages creative thinking during combat (rather than simply using whatever option seemed the best on my character sheet). For that, I prefer 5th to 4th. On the other hand, because I started 4e when 5e was just about to be released, I was able to trawl through all the different character creation options and make exactly what I wanted, which is still missing from 5e (at the moment).
I think that the 8-hour battle is a perfect (if a bit extreme) example of how new players can view the 4e system and take it to a ridiculous extreme: The character sheet and powers focused on combat, so we had a lot of battles... And as I leveled up and got more powers, there was even more combat for me to use them in, and it just snowballed. Sure it was fun, but it became a battle simulator rather than a roleplaying game.