well it's the only think standing in the way of the regular series from progressing, it was so bad capcom doesn't like to even aknowlege it's existence so much that they can't move the plot past itThe name is not as cool so Devil may cry stays. DMC2 is the only real direction left but I'd rather they leave that for DMC6. Best bet would be use DMC5 to tie up some loose ends, win back some trust and fill in the gap into DMC2.
Thats not a good idea because you are trading a young rookie with a lot of character potential for a veteran with none. thats why we got DMC4 and the anime.