Personally, I don't trust cold crashing alone to stabilize Cider.... Yeast goes Dormant -- it doesn't die from cold temperatures... If you want some sweetness, you either gotta sorbate it or pasteurize it... Your choice. (I haven't fooled with Keeving, so I can't comment....)
Making sparkling cider without kegging or priming just depends on your timing.....
When I want a slightly sweet, sparkling drinking cider -- I cold crash when I hit my target SG and rack straight into bottles, cap, and immediately stove top pasteurize..... I honestly haven't ever needed to prime or keg -- they come out sparkling when I do it this way....
No de-gassing = plenty of carbonation for my tastes.... Now, it's not Champagne carbonation levels, but it is very nicely sparkling and makes a great drink on a hot day!
The down side is that you get a little trash in the bottom of the bottles after 2-weeks in the fridge.... but after a few weeks to a month - it stays put pretty nicely. Pour slow and all you get is a nice clear glass of carbonated cider.
Thanks
John