The experience gained is compromised by a large now! I can only gain less than 10 exp even if it appears to give 100 exp
Yes, the current exp system gives your party members exp depending on the difference in level between the character and the enemy. If the enemy is a higher level than you, it gives you more exp than if it is lower level than you. This is not yet reflected on the battle result screen, but we intend for it to be displayed in the future :)