left once, came back on the request of a friend and left again after
hybrid skillgain system sucks ass, its not as bad on epic where by the time you're 20 skill and its no longer 100% tick rate no matter what you're curved to 39 skill, but on jackal unless you've got someone supplying you 70+ ql tools skillgain is nothing. most skills in the game are actually slower than on freedom despite it being a temp server lol.
barely any new content, its just doing rift camps on newbie accounts, which you could already do if you really wanted.
rift ai is a straight up chore now, with all their dumb mechanics and awful ai, feels like you fight the game more than you do mobs
jackal has near nobody on it in australian hours (80% of those on are alts, ive seen the alliance lists) so im forced to either pull all nighters on the weekends just to play in a group of more than 3 or abuse the rift mobs shitty ai and solo the camps myself, fun for the first few times.
skill transfer is near nothing, it doesn't take into account coc or sleep bonus either so you wont get much skill coming back, your affinities dont come back, your rares dont come back, your deed dont come back, everything on jackal seems pointless because it'll all be gone in a few months anyway, and all you'll have to show for it is some memories and a weapon skin
all in all a meh experience that i could have just had on a wu server. maps pretty cool, if it was a freedom server i'd probs live there