Seems like a reasonable set up to me but I would be wary of staying too static. You definitely want to pressure your opponent and get into close combat with them. It looks like the first wave is one squad of boyz and 2 trukks to tie up your opponent while the other 2 big squads march up the field with the warboss?
Da jumpin' a mob of 30 shoota boyz is supper fun. Check out the battle reports posted by my friend Wyddr to see the fun I had with that. Using Trukks to add pressure to your opponent is a good idea to go along with it. I'd agree da jumpin' shoota boyz over slugga boyz. You get 60 shots off instead of 30, which is better if you fail the charge afterward. If you do charge, it's still a possible 61 attacks, which is pretty good too.
I would recommend a Big Mek on a Bike w/ a KFF if you can squeeze it in. It helps protect the Tankbustas/Trukk from the shooting they will draw and the Big Mek can repair the trukk, which all helps keep you rolling longer.
I don't have any first hand experience with Koptas this edition but they look overpriced with rokkits because of their poor ballistic skill. Don't forget, they have free bombs that can be used to inflcit mortal wounds on units they fly over. I think that is where a lot of their increased points come from. I think I might try them out with Twin Big Shootas, bombs, and a killsaw. Use them to fly them over infantry for a bombing run and try to assault vehicles to tie them up and keep them from shooting my boyz.
I loved Lootas in the last edition and they are reasonably priced and versatile in this edition and can bring the dakka.