Enlisted needs a game mode filter more than anything else.
Out of all the recent discussions, I almost never see any concern over the lack of QoL features that are preventing Enlisted from reaching its full potential.
The one that is needed the most is a game mode filter. Not being able to select the game mode(s) you want is the primary cause of desertion at the start of matches. Players don't want to spend time doing something that they don't enjoy. People desert because the game gives them no other option.
For players such as myself who have no use for XP, the penalty doesn't matter. But for new or mid-tier players it can become a common hinderance.
Allowing people to filter game modes would not only solve this problem, but would also improve the map like/dislike system retroactively. Since each map is separated by gamemode, the votes you get are spread thin. If I was able to filter the game mode selection to only Invasion, the votes I get would go much further since the list would no longer be diluted by all the different variations of the same map.
I can't imagine that this would be difficult to implement, so my conclusion is that its been left out due to a lack of caring or because Gaijin/DF thinks that it would somehow split the player base.
If a certain game mode (i.e. Conquest) ended up empty after a filter was added, in my eyes that just means that it is despised by the majority of players and needs to be reworked so more people are willing to play it.
Many people hated Train Escort and it ended up being completely removed from the game. So why can't we get the option to select between the current game modes?
I am confident that it would end up increasing player counts, due to less people quitting over such an asinine QoL flaw.