I don't play Fortnite but Epic are clearly the true innovators of the industry right now from gameplay ideas to player satisfaction. Even Ubisoft have done well with Siege in creating and growing a huge brand that keeps gamers engaged for years.
Call of Duty and Battlefield used to be the true innovators of shooters but now COD is just a stale format that has to poach from other popular games like Siege, Fortnite and Overwatch whilst Battlefield 5 may as well be a Battlefront reskin minus lasers.
COD's mistake for me was their definition of innovation being simply the era and their obsession with wallrunning and boost jumping. Everything else got neglected and tired including the leveling and general format. Battlefield has just gone backwards with less weapons, features and even a lack of 'levolution'.
I used to admire Treyarch for all their work and what they achieved every two years but the studio is just a shambles now and DICE are fucking idiots who just don't have a clue.