I still think rerolling accounts defeats a little bit of the game
I mean, if you want to just fly throu early maps with little to no fun then go ahead, maybe you are a veteran who is starting a new account and want to catchup quickly, maybe you are a new player who just wants to advance as fast and as far as you can; but i really enjoy the troubles a map can give you, and i do over 90% of my maps blindly simply because i like to come up with my own strategies and have my own problems while beating maps

My experience if you want to read it

I started playing Nutaku Aigis since the very first day, got an army and got to the shrine with the tutorial summon (kerry at the time, Bashira now) and later rolls were, in that order: Bashira, Jerome, Sheril, Calliope, Valerie. But then i used CE and the great "accounts rollback" for cheaters so i had to start over, i really thought of rerolling accounts until i got a black so i could have a head start. But i decided not to; first months of premium rolls were all silvers (i cannot stress MONTHS enough) and i already flew throu the maps since i already new the layout, enemies and all that. It was when first Anya event came and i managed to barely get enough stars to beat the event. Then i got something other than silvers, i got my Sybilla, not just any black but my waifu; i quickly got her to lv80 and fed her all the rainbow fairies i got. a few events later i got Nanaly and i use her on my main team ever since.
I don't use Sybilla on the first run of any map, nor use Nanaly's skill; i like to have a feel of the map before deciding if i need OP blackness or it can be done with the main team. It's all part of the fun, and eventually you will get the units you need and some of the ones you want