I personally thing MOBA was an overall improvement, but there are some things that are irksome as hell. Such as the new xenos being able to slash through walls thing. Boilers being able 3x3 acid spray spam near endlessly while moving from long distance, preventing many many things from happening.
While I understand and agree with the need for pylons, god damn is it irritating as fuck for someone who enjoyed the endless hours upon hours of JTAC fire missions.