I've finished getting all the achievements that I want to get from FLs about a month ago or so after close to 2.5k campaigns, most were done before I start actually partying up with friends to start the daily spams. Since then I only queue solo once a day very occasionally (low priority), or do more than 5 a day if a friendo wants to party up together.

If they take away party queue, I'm just gonna bench Frontline for good. I don't like getting matched with bunch of defeatists. They ruin my enjoyment out of the game more than "premades", just like how those enablers in regular DF contents who pardons terribad plays in current contents just because "it's just roulette bro".