yes upgrade weapon/vehicle is harder but in enlisted has no additional cost in repairs unlike H&G where you have to earn maximum amount of credits while using few mods as possible.
in Enlisted Meta is to hit enemy first.
as pilot you have to use brain rather then fly over and drop bombs and watch kill feed go up since theirs many players who using cover. Radioman is meant suppressing rather then killing players. Lmg players you need to crawl and use bi-pod rather the H&G where you hip fire entire building in Rambo style and mortars not gotten that far since i'm not MM with them.
in here plenty complains about HE spamming tanks also its not like H&G where AT weapons can pen everywhere with success...just try throwing it under the tank [while cooking it]
Theirs plenty things to deal with tanks explosion packs, AT rifles, Radioman, planes and also engineers who can build cannons [which can be get by newbie players].
about battle pass well i dont have to worry about then also the last payout isn't that worth it the main thing is earning orders.