Battlefront II, in gameplay terms, is a huge step up from Battlefront I (2015), but should we expect a Battlefront III in 2-3 years? Personally, I am a big fan of expansions to a core game (new features, modes, campaigns), rather than a new title, especially if the multiplayer progression system involves a significant time investment.
I think balance concerns over drop-in spawning are valid, but the game currently feels like a solo queuing game even while grouped. Spawning reinforcements in waves is a good thing, but the current spawn-based squad elements offer little to no value gameplay-wise due to lack of communication and the UI elements are distracting.