On frontlines.It has 2 main problems.People who tryhard for mounts but in the wrong way.They keep spamming nodes calls and dont understand its pvp and that to win frontline you need battlehigher later to contest nodes.Their calls uusaly result in splitting the newbies and the ones who actually know what they are doing in 2 usualy causing the enemy gcs to get fed battle high and then stomp them.
Then there are the people who feed on purpose.They come in for the xp bonus to level jobs.they dont care about winning or learning how to play.You will see them.They are the ones getting on mount and running to enemy base on purpose to feed and make game end faster.This should be a bannable offense and xp bonus should be removed from pvp.These 2 changes would vastly improve frontlines.
Along with being able to report the ones spamming node calls who have no idea what they are doing.

Feast is a different problem.The community is the most toxic in the game.Not to mention there is a lot of boosting and win trading.Ive seen some of the top 20 on my database deliberatly throwing matches to other people and then trying to frame others.There are also people getting into top 100 on different data centres.This is just wrong.it should be one reward per account.
Feast ranking system is also terrible because even though The season last a certain amount of time you have no chance if you dont spam queue the first few weeks.This is because most of the community get to desired number and then all stop playing at same time on purpose.It kills the queues and means nobody else can climb up in ranks.Its a bad system and needs a complete overhaul.

I personally dont like rival wings but its the best of the 3.best community and team work out of the 3.Apart from the recent revelation of the cheating expsosed with lifting the mechs above ground i have found no fault with it.I just dislike the idea of using robots in pvp.