It has rather steep learning curve but melee is very colorful and deep. The way you have to use every aspect of your weapons(for example pollaxe has cutting, crushing and stabby parts) depending on how heavily armored the opponent is and where you aim. Visors on the helmets obstruct your view but give you better chance to survive that slash to the face, helmets without visors protect your head from sides, back and top but leave your face unprotected, half-plate has good protection for your torso but leaves little to no protection to your arms and legs, chainmail protects only good against slashes or some weaker piercing strikes but give you better mobility, the list goes on.
Squad-Leaders get tactical perks to buff yourself and your team-mates for short period of time and tagging ability so you can mark that annoying, bush-dwelling sharpshooter for your comrades for little extra points when they chop off his/her head. Also they work as mobile spawn points, as long as the squad-leader isn't being directly attacked.
Microtransactions give you instant access to some prettier versions of gear and extragavant dyes, but none of them cost more than you could get in couple hours of frantic shield-bashing and eye-gouging. Only minuses I could think of are very small ammount of maps and unpolished spawning system where you sometimes try to spawn on your squad-leader and instead spawn outside map boundaries or in the middle of frantic melee.