Normally I'd may say splurge, but 3k is a lot of money. Being able to walk/boat from EPCOT and HS is a huge benefit, but the skyliner is basically the "B" option to that. Other than right in the morning, or park close there usually isn't that much of a line for it. The pool is obviously better at YC but CBRs isn't terrible, and you can easily just hop midday on the skyliner to the Boardwalk area and enjoy all the other amenities of the area as if you were staying at YC.
Honestly, you know your finances and whether or not 3k is a lot for you to splurge. I, personally, wouldn't spend 3k more for YC. I would either opt for a split stay to try both, upgrade my dining options with the 3k like firework viewings or whatever the EPCOT show would be at your time, maybe do a park tour/dining experience like the safari dining, or for 3k I could do a whole other trip later in the year.
For myself, when I want to stay at Crescent Lake, I book Swan/Dolphin for usually less than CBR with their AP rates. But do note you do lose some of the Disney bubble as they lack the Disney theming