Marcus is a good unit throughout the game however around chapter 20 Kent and Sain will be close to caught up offensively and defensively. They will end up with much higher stats and end game bar resistance and skill. Lowen never really catches up offensively to Marcus though he ends up with much higher speed at 20/20 (4ish points). Lowen is a wall on a horse though.
Bottom line Marcus is never bad he just starts to get out classed later on, but will always be able to contribute in a meaningful way.
@Alexmender I just sent you a friend request. Name is Emeri lead is currently Ryoma. I would prefer a combat focused non blue lead as my Shanna is 4 star. I can change my lead to.
+spd/-def +3Nino
+atk/-hp Klein
+spd/-hp H Nowi (still SP grinding her)
It will be much harder to rank in the final round the it is now due to the much larger pool of people would honestly expect corn to not have 100000 people on his team though the last round will have teams of well over that. That will make your flags not go as far not to mention total rank gets flags also. You can only spend so many flags in good multipliers on the last round. So you will be unlikely to hurt your feather total by spending on good multipliers this round instead of saving them all till the last round spending more on lower multipliers.
Seems precious chicken Dragon is just not popular enough even with crazy multipliers. Though honestly the fact that she almost won is bad considering the massive team size difference. They need to tone down the bonuses, make it so being on the losing team helps you in overall ranking but will not make a team 6 times larger lose or almost lose to multipliers.
It is not impossible but think if all the people who could get upset at a child having the wrong hair color. It would imply their favorite ship is wrong. That would upset some people and could cause a few issues from a very vocal minority.