I just played my first game with a snowspeeder and it was great.
I ran it naked and deployed it far from enemy units and to one side of the board. It moved up and faced the middle of the board. From there it could move and aim for several turns shooting down a bunch of troopers and got the last wounds on vader.
The enemy focused my at-rt with his main impact so when the speeder got in range there was only saber throw and some dlt left. I got lucky and saved most dlt hits. The speeder ended on 5hp, should maybe been 3.
I feel it can get shot down if focused, but cover 1 helps a bit vs impact and defence surge gives it a chance.
The lack of offensive surge makes it very dependent on aim actions to make its attacks effective vs cover, but it can shoot troopers in low cover and see over the terrain.
I only had one turn were I could have fired a tailgun so I think I will not pay 20 points for the ground buzzer. Maybe 8 points for a single die that can give supression.