I knew all about this proces when the game first came out, my first rolls were great; Bashira, Lilia, Jerome and Kerry (yes, aside from the tutorial one at that time) but those were awesome enough for me to keep it; then i cheated and got my acc reset, starting again was rough, that was a week or two before Anyas event and managed to get her perfectly, the first rolls were all silvers, but i decided i have lost way too much time already so i kept it, the next month i rolled a Sybilla and a few months back a Nanaly
imo rerolling accounts is not THAT necessary unless you are in a rush to advance to a given point for any reason, or really want to start with your waifu by your side.