The biggest problem with GLOPS is that:
- It fundamentally multiplies some problems. The vehicles that are toxic but die early on if played incorrectly become REALLY toxic with infinite respawns
- It combines the negative sides of both modes, PvP players complain about balance issues while PvE players complain because it's fundamentally PvP
As a result, it isn't liked by anybody except for a narrow niche of experienced players, who get to identify the FOTM meta and pwn the shit out of everyone else. As you might have imagined, that's not a good recipe and it cannot be realistically built upon.