Of course the guns in Marathon feel good. If they didn't, you wouldn't be reading this because I would have spontaneously combusted in Bungie's Seattle studio when I visited for eight hours of hands-on alpha gameplay with this crew-based, 3-player, PvPvE survival extraction shooter. Destiny gets a lot of deserved criticism, some of it from me, but Bungie's always had industry-leading gunplay and art direction. Marathon is flexing those same muscles, thoroughly toned after 10 expectation-defying years of live service looter shooterdom.
Marathon is, predictably, wondrous in your hands and easy on the eyes. There's a lot I can't say with confidence after sampling an experience built for long-term commitment, burdened by all the things I know I don't know, but this is probably the best-looking, best-feeling extraction shooter ever made. But for a thousand reasons, that alone is not enough to ensure "the next hit PvP experience" that Bungie and Sony are very loudly betting this will become.
