For those considering DW8 Complete when it comes out on Vita March 25th in the USA and 4th April in Europe, it seems the game was quietly patched in January and actually now runs quite well, certainly on par with DW:NEXT, which is impressive given it has full-sized stages taken from the PS3 version and high quality character models. Still chugs a little during musou attacks (unfortunately the guy doesn't use them that often) but on the whole the frame rate is now pretty solid and playable
Here's a vid, not a great player but he does a good job showing before and after the patch (some swearing, it that bothers you)
Looks good, considering this is going to be much cheaper than buying vanilla DW8 and XL seperately (Complete Edition is only for PSV and PS4) I think I might spring for this version :)
EDIT: Bodes well for SW4 and Warriors Orochi 3 Ultimate (if we ever get them...), I may well buy all my Musou on Vita from now on if the quality of the ports remains consistant
