Me and my sister have beaten the Cross Controller Pack for LBP2. I decided to make a thread to comment on it's implementation.
A great fun pack to play with friends and family.
I don't think it's a con that it requires so much space on the Vita. If it had been simply video feed sent from the PS3 to the Vita, you would not have been able to utilize the Vita's touch and movement features. You cannot touch a "video stream". Video is static, no interaction. The data on the Vita is basically a game in itself.
However, this COULD have been done differently by using LBPV to render the graphics for those who own LBPV. So like, in setting up, you're asked if you have LBPV or not, if not, then you download the app. If you do, LBPV could have been updated to include a "Cross Controller" option.
Just my opinion..
But yeah, no matter what, if the VIta didn't have it's own app for this, one way or another, then we would not have had the touch and movement features.
Here's something that's a "pro" for me. I have two PS3s and I was worried about how difficult it might be to go from one to the other using the Cross Controller. I thought I may have to delete one from the Remote Play list and re-register with the other. But having the Cross Controller App installed on my Vita, I was able to just run that from the Vita and connect to both PS3s without any extra configuring.
It does not seem to matter which PS3 I am playing on, just as long as I am logged in with the same account. Just go to "Cross Controller" on LBP2, and run app from Vita, and it's connected.