I don’t know if this affects anyone else, but it gets quite annoying when I use one of my REQ or XP boosts, then halfway through the game I lose connection and the boost is still used up. This gets especially bad when it is a high-value boost like Ultra rare or legendary, because that is a significant amount of XP that you have just lost ( RP boosts don’t really count, 750 points in a legendary? booooooo! 
).
My suggestion to fix this is to ( although it would be difficult ) allow the game to recognise if someone has lagged out of a game and ‘refund’ their used boost.
I love Halo 5, but it’s a shame when small things like boosts and how easy vehicles are to destroy ruin the overall experience.
I would like to know you guys opinions!