This game has a really good foundation.
Movement is very fluid and the speed feels just right in normal and focus movement. I would like to try this out with some tighter patterns (if that is your plan) and see if it hold there, but so far I think it would feel good there too.
Visual feedback:
In the below section, my rapid shot was hitting the enemy, but it didn't seem like it was dealing damage. There was no obvious indication that anything was happening. Once I focus shot, I got the reticle and rolled with it until he died. There was a decent amount of time I was dealing damage and I didn't think I was affecting him and thought maybe I need to take out his side arms first. (watching my replay back I can see the body is flickering blue/gray. During game play I didn't notice this as the overlapping blue shots blended it in with my peripheral view. Maybe a different color would help? Close to his death he flashes red and that is obvious, so maybe orange before).
Another thing I noticed is a lot of the explosions outside of my direct view look like shining pickups, similar to the DDP games where you can shoot a point to expose a bee pickup. Not necessarily an issue, but it is a little distracting at first.
I think if the explosions were confined to an enemy this would be less distracting. For example the first stage boss has explosions happening off his model and a little further away as seen below. 
At some points when I switch between focus and rapid it seems I am cancelling bullets but am not sure how that works.
I am looking forward to the release, I think its gonna be a solid STG and will be a day 1 purchase from me at this rate.
Good job.