Upkeep is unbearable and extremely punishing. Everyone is running around naked and tries to use picked-up weapons because you pay more upkeep for something the more you use it. AKA, solo the entire enemy team and you're losing more money than just going naked and unarmed.
The initial grind and returning grind is incredibly steep, and the entire new combat system, even though I like the damage calculation, is very punishing for new players. The sprintonly adds insult to the injury if you're not used to it. The wounding effect and the slowing down below a certain HP treshold really is only annoying. You win a tough fight against someone or take a single hit and are reduced to a tipped-over turtle that's slowly dying without being able to do anything about it, since a med-kit is way too expensive to carry along a melee weapon. Many of the machanics are based on realism, but only just kill the mood.
I like the mod and the idea of it, and it certainly has tons and tons of potential, but I'll say that in the current state it's quite ridiculous.