It depends on what type vacation you want. I think I get a lot of bang for my buck at WDW. I love US/IoA, and have stayed there in the past..and really enjoyed it. BUT..if I want to spend more than 3 days (total) someplace, then US/IoA isn't going to get it done for me. I find it hard to spend more than 2 days at US/IoA...even then, I'm done by 2ish on that second day. So, sure..there is less to do. But, by that same token, there is a ton more to do at WDW for your vacation dollars.
You don't have to stay at a deluxe resort at WDW..you can choose a value resort. You get to choose from only three onsite resorts at US/IoA...and they are all pretty upscale. I think the least I've paid is about $170 a night....I can get a moderate at WDW for that. No, the two don't compare but if US/IoA had a lesser priced resort, I would stay there. I don't need deluxe.
As far as numbers go...I priced out a stay at WL, from Oct 13-17. 2 adults, 2 kids (6 and 12). I used a standard room, no special view. Added the
DDP. 5 day passes (non-hoppers). Total came to $3431. I priced out the same stay at Hard Rock Hotel at US/IoA. Added their dining plan, which isn't nearly as good or all inclusive, as well as Mears transfers. The passes covered 2 parks for 3 days (not nearly the same as the Disney passes....5 days, 4 parks). The total for that was $2241.
The difference?? About $1200. Can't buy 3 MacBooks with that...maybe one. And again, you are getting four parks, with much more varied dining options, with your Disney stay.
But..perhaps you don't need those things. In that case, a US/IoA vacation is going to be perfect. I like to combine the two....5 days at WDW, 2 days at US/IoA.
Yes, it's expensive. Especially when you add in the costs to get there to begin with. For me..that's the killer. Not the costs when I finally get to WDW.