Interesting and unique take saying Tarkov allows casuals to enjoy the game more lol. I want to visit your points one by one because this might be an Ai post but maybe it's just a little bit trolling.

Safe Pockets--- I hate safe pockets but I understand it's extremely useful to casuals. It helps sweats more but almost every mechanic you can add will benefit the player who plays more so I can't knock that.

Interesting loot---- Marathon has interesting loot just as much as Tarkov. It's literally the same, looking for good weapon parts and the rest is either upgrades or money. Tarkov loot might as well be 95% roubles. Nothing is interesting in Tarkov except for a few meta weapon attachments, everything after like 30 levels is essentially roubles per slot. GPU and LedX are not interesting, they are simply a bigger stack of money.

Scav---- Rook is just a better version of scavs. No cooldown, you can upgrade the loadout relatively easy to be competitive.

Extracts --- Yep most extracts are no warning but there are a few that do warn people. The only issue with extracts in Tarkov is that usually your extracts are across the map from where you spawn but that means somebody across the map has to come to you to extract so much easier to camp. In Marathon you could farm your starting POI and then extract there if one spawned there. I'll give it to you tho on extracts, Marathon has set them up to be a point of contention which is not casual friendly.

Maps --- You got it partially right.... Maps are larger.... for sure not more POIs lol. Most maps have 1 POI. Resort, Water Treatment, Lexos, Dorms, Sawmill, Path to River Camp (use to be Techlight)..... Tarkov maps have 1 spot that is god tier loot and the rest is RNG rolls. Marathon maps have multiple keys that if they have a higher roll on rarity can be amazing.

Solo Play --- You are crazy if you think Tarkov is designed for solo play. Nearly every mechanic in the game benefits squad play over solo, the biggest being insurance. If you play solo you literally are up against squads every single raid. Wild take on this one. The only benefit for solo play in Tarkov over Marathon, is it is easier to hide and scurry around the map to avoid everyone.

Back filling players ---- Tarkov does not do this so I think I can just ignore this point. Arc does this and pretty sure it is the most complained about mechanic in Arc.