I probably wont be using NG+ cause I already use alts to replay story on different jobs. (Unless they introduce achievement rewards or something for it later)

I would say though... My alts get EXP and gold and stuff. If people were gonna abuse the system then the system is already there ripe for abuse, you can already use story exp to level every job to 80 via alts and have a shit ton of high quality crap you can trade back to your main. Asking for EXP on new game plus honestly isn't asking for much more than a QoL change letting that exp move from alts only to all characters.

If its considered way too easy, then cool have it be half the original exp reward or something. But as someone who levels whatever Im not maining casually rather than optimally purely because I find running the same thing over and over boring af, more varied ways to level is good for a game imo.