Any word on how bearable the game is without the packs? Are we talking Lego City load times, or just a lot of pop-in? I've been having trouble with space allocation on my Wii U ever since I grabbed Metroid Prime Trilogy, which I would have to clear out for sure, although I would prefer not to as that's a piece of software I still hop in and out of every now and then. I suppose if I commit to not touching MPT (plus some other big occupants) until I either finish XCX or buy a new external drive, I can swap it out for now, but it's not exactly convenient to have to plan for a massive download far in advance should I feel like switching back one night.
https://www.youtube.com/watch?v=_7lBVaLb0nw