I just LOVE it, a speed freak list that I can help with.
A few changes to your list, not deletions, additions.
With the trucks add in wrecking balls. They attack in the shooting phase and are decent dread killers, especially those still pesky BA dreads.
At this point level split the death coptas into squadrons of one, as pairs you will fail the LD test every time one gets killed. As solo coptas they are either on the board or dead.
As for the blitz bomma, too risky for the results. I proxied one once, and had both bombs miss, and a "clipped em" result. Funny; yes but not if you are actually trying to win. If you haven't built the bomma yet switch it to the burna bomma, it will be more effective. Or, since you are lacking in air defence maybe make it the fighta with extra supa shoota and ace upgrade. You have plenty of armor killing stuff with the boys and the nobs.
For now, go with the regular FoC from the rule book. The objective secured is a way better bonus. It is a hoot when a single boy can trump a venomthrope to control the objective at the end of the game.
For your second FoC, take a pain boy on a bike to add to the bikers resilience, and add in two more truck squads and some rockit buggies.
Just to give you an idea of where you might want to go with your list, I will share my current list so you can maybe consider what to add later.
Foc One
Warboss with heavy armor, cybork, boss pole, head whoppa, TL shoota
10 Ard boys one is nob with BP and PK mounted in a truck with wrecking ball and ram
12 boys, nob with BP and PK mounted in a truck with wrecking ball and ram
12 shoota boys, nob with BP and big choppa mounted in a truck with wrecking ball and ram
3 rockit buggies
Dakka jet with extra supa shoota and ace
5 death coptas with rockits
12 tank bustas, nob with BP in BW with ram and grots
FoC Two
Pain Boy
12 boys, nob with BP and PK mounted in a truck with wrecking ball and ram
12 boys, nob with BP and PK mounted in a truck with wrecking ball and ram
3 rockit buggies
5 death coptas with rockits
Dakka Jet with extra supa shoota and ace
FoC Three
Big mek with KFF
12 boys, nob with BP and PK mounted in a truck with wrecking ball and ram
12 boys, nob with BP and PK mounted in a truck with wrecking ball and ram
5 death coptas with rockits
5 death coptas with big shootas
Burna bomma with 4 burna missiles
10 Lootas in BW with ram, 4 rockits and grots
The list is variable points, as I never know what the daily point limit at my LGS is going to be so I have it broken down in tiers that would take too long to list out. With all the above it comes in at just shy of 2k points. Dropping one FoC makes it about 1500. (with smaller squad sizes, etc)
The tank bustas are surprisingly effective anti air, 12 shots will usually take out a flyer. Lootas do the same when I take them.
At my LGS there is a LOT of air power going around, even more so than the armored phalanx of days gone by, so I am still adapting to the air campaign stuff.
Hope that helps