Personally, I think that any hotel one stays at during a WDW trip (regardless of how much time you do or don't spend there) plays a crucial role in the overall magic of your experience. My wife and I routinely stay at Deluxe hotels when we go to WDW (we usually rent DVC points), despite the fact that we go without children and spend a lot of time away from the resort.
1. I think there is still a lot to be said for theme, vibe and overall "aura" of a resort. While I don't think there is anything wrong with Values or Moderates (quite the opposite, they both have phenomenal qualities), for my taste (and I'm betting for many solo adults), the vibe, theme and "aura" of a Deluxe is preferable to that of a Value or Moderate. If you love the way it looks and the way you feel while you're there (or think you will), then it is worth it.
2. My wife and I have a young daughter (too young to go to WDW, at least in our opinion, yet) and love children, but on our adult trips, we prefer an atmosphere at our resort that is less chaotic and more calm. I think Deluxe resorts have a leg up in that arena. Additionally, an argument might be made that because of the more concise layout/size of the Contemporary (compared to say, a Moderate like Port Orleans or somewhere else with a sprawling lay out), it's more beneficial for you in terms of not wandering the resort every time you want to leave/come back.
3. You can't oversell the ease of access to Magic Kingdom and Epcot (via the monorail). While that may not be entirely worth the price increase, it is
definitively valuable, not to mention the easy access the monorail also provides to the Grand Floridian and Polynesian, and the bar/food options those resorts present.
4. My wife and I simply love to try new places. I personally love to compare and contrast, plan for future trips and be able to "check-off" resorts. Again, not necessarily something that everyone finds valuable, but I love experiencing new things, so I can see that having value. <-- Not sure if this would be a first for you at this resort, so if not, this may not apply.
5. Lastly, I splurge when at WDW. I save up and spend how I want to; I generally take this position on all vacations. If you want to stay here, do it! It's your vacation.
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In the end, you can't make a wrong decision here. Even saving the $ and staying elsewhere isn't bad - hey, you're still at a WDW resort and on vacation
All in all though, I say if you want to stay there, go for it!