That is... staggeringly low, almost insulting. In Crystalline Conflict, on average the match lasts 5min discounting overtime, prep time and queue time, giving you 900 S-EXP for winning and 700 S-EXP for losing.
If I read the descriptions on Frontlines right, they can last up to 20min without overtime. For even the 1st Place to be worth the input regarding Series EXP, it would need to net like 3600-4000 S-EXP for 1st place, going down to like 3200-3500 for 2nd Place and about 3000 for 3rd Place, assuming a match went for 18-20min.
1500 for first place is paltry.
Ill await your results, but honestly this is just brutal. It should not need to take an avid Frontline player this much longer than a Crystalline Conflict player to reach Rank 25, the input

utput ratio is completely messed up.