CS:GO's April 17 update features an experimental 1v1 warmup mode, currently limited to Wingman games on Train and Vertigo. It also introduced the ability to see other players" crosshairs when spectating, plus a new set of music kits.

1v1 warmup - what is it?

Get a few reps in before the match begins with an experimental 1v1 warmup mode! The experimental warmup is currently limited to Wingman matches on Train and Vertigo, and may be added to other maps and Competitive Matchmaking in the future.

In an interesting revamp of competitive gameplay, Valve introduced a unique one-versus-one warmup mode for Wingman, with random weapon spawns and instant resets after you score a kill. Based on the radar, it seems to be placed on a distant part of the existing map, and it is fairly fateful to the 1v1 custom map experience. It remains to be seen whether it will be expanded upon for 5v5 gameplay or any of the other seven Wingman maps currently in the pool.

CS:GO spectator crosshair update

Wondering how your teammates see the world? As a spectator you can now view other players’ crosshairs.

The new CS:GO update also introduces the opportunity to spectate your fellow players using their crosshairs. The default settings will only do so in the case of friends and party members, which can be adjusted to include everyone or to completely turn off in the game. You can also copy any fellow players' crosshairs

The official blogpost and the full update release notes are available here.