I haven't tested this, but someone said that the gunship can no longer be damaged while it is moving. In SCRS loud speedruns, speedrunners would grenade the gunship while it is moving so it fires the first missile sooner. If this has changed, then that strat would no longer be possible and a new split would be necessary.

This can also apply to Ironman speedruns where SCRS is done loud (assuming that this is actually true).