I've never been to WDW, but from videos I've seen and such, it looks like you break the bubble MUCH more than you would in
Disneyland. The two parks basically feel the same and fully in the bubble at all times. Downtown Disney has the Disney bubble feel, very clean, well lit, safe, music, etc and is an extension from the parks pretty much.
Disneyland Hotel and Grand Californian feel 100% the Disney bubble. Grand Californian has entry ways right into California Adventure so you really can't get any more bubble then that. Disneyland Hotel is a very slight bit more removed, but it's all Disney property, music, well lit, safe feeling even at night, it's bubble, and has a certain "classic Disney history" feel to it.
Pixar Place would be the one most removed from things, you would be walking across the parking garage or up near Disneyland Drive a little bit (a few hundred feet or so), but that amount, believe it or not, let's the normal world in. I haven't seen homeless there, but you see the cars racing up and down and just are reminded that there is a boring normal world just right there that you'll return to soon.
Personally to me the bubble is totally worth it. Even with the stupid insane prices, but I don't cut out dinners and stuff like that. If you had to... I would really think long and hard on that. I have also stayed at the Westin (Marriott property) down on the corner of Katella and Disneyland Drive. I'll walk up Disneyland drive, cross the road at Pixar Place/Grand Cal and then head into Downtown Disney like anyone would if they were staying at Pixar Place. It's approx 1,850 feet before you're into the normal path Pixar Place guests would take, and thus entering the Disney bubble. Two intersections you'll need to cross (personally I cross Katella and then usually walk up the Grand Cal side of the road and then cross at Paradise Way since that seems to have a little less traffic than Katella). The Westin is a gorgeous new (~3 years?) hotel... honestly nicer than Disneyland Hotel... and shockingly is often like $350 before tax a night. You can also use points here (I think I've seen it as low at 40k/night). Personally the amount of "activity" on Disneyland Drive has been MUCH less than what I've heard on Harbor. That said, there was a homeless person sleeping DIRECTLY outside the Westin one one when I was staying there... I'm sure the Westin loves that. But walking up Disneyland drive I saw no one yelling their agenda, homeless/drug user, etc. Just some Disney goers making their way to or from the park. I usually stay here on the day I arrive since I get there late in the day (~7pm) and then depart the next day by 3 or 4pm to drive up to Universal Studios, then at the end of my trip I swing up to Universal Studios again, so sandwiching my Disney time, and I'll stay at the Westin again when I drive back to Disney since the next day I'll depart late in the day (~5pm) out of SNA. Those two times the Disneyland Hotel and $600+ minimum a night isn't worth it. BUT, then I'm at Disney mid trip for four days in a row, Disneyland Hotel or Grand Californian for sure.
(The Westin also is **amazing** if you're an America Express Platinum holder. Not only can you use Amex points but you also get the fine hotels and resorts benefits and this location offers daily breakfast for two, guaranteed 4pm late checkout, wifi, and a $100 food and beverage credit. You also get a room upgrade when available and noon check in if available. I've only stayed there once before but was upgraded to a premium room on a high floor with fantastic theme park views. This year since I'm staying twice, once at the beginning and once at the end of my trip I'll get two $100 food and bev credits and I'll certainly make use of the late checkout both times since at the start of my trip I'll depart the Anaheim area around 3pm to head up to Universal Hilton for Halloween Horror nights and then at the end of my trip I'll leave at about 3pm to head to SNA for my late flight home. I'm very curious if I'll get lucky either, or both times, on getting an upgrade. The Westin also will trigger the Platinum's $200 hotel credit, and earn 5x MR points.
Two nights at the Westin, a Fri-Sat and then Sat-Sun later in the week is running me $830 after tax while
one Disneyland Hotel night is running me $787 after tax. If I factor in my $200 Amex credit the Westin drops to $630 for the two nights...)