FromSoft said that the invasions won't just take soul level into account, but also time played. So a newbie won't be invaded by some asshole with 400 hours doing a low level dickwraith build. Also, magic, armor and weapon scaling is tied to stats, so for someone to stomp in with Havel's armour and a fully upgraded pyroglove is not going to happen. If you get invaded, it's most likely gonna be by someone at your skill level.
Also, there's an option to turn invasions off, but you'll lose bloodstains, player messages and the ability to summon help during bossfights etc.
I played the beta, and while I fucking hate invasions in Dark Souls, I had a lot of fun with it in the sequel. Most of my time was spent with backup from the Blue Covenant, so I wasn't alone. Jolly cooperation! My guess is that it's gonna be pretty fun, and I'm still stoked about the game.
It goes both ways. There have been several times where I've quit the video early on just to go buy a game immediately. Mostly with smaller, downloadable titles that have flown under my radar. And other times I've been eagerly awaiting a game, only to see in a Quick Look that the gameplay is nowhere near what I expected. Can't think of a good examply off the top of my head, but I find Quick Looks to be a wonderful way for me to decide where to spend my time and money.
The fact that they're often hilarious in and of it self is just a bonus.