Different than how i think of Boyz mobz in 9th. Back in 5th i would include hvy weapons in my mobs but less in 6,7, 8 and 9th edition. Also i have recently come around to Smasha Gunz > Lootas. The Math of killy per points and survival per points leans in their favor. In 8th i would run bad moonz (lootas) plus evil sunz (MANz). Now i think deathskulls win.
What i would consider changing:
Remove the rokits from the boyz mobz and put the points into Tankbustas.
Consider dropping my age old favorite (lootas) for the more durable and killy smasha gunz.
I think one of the most cunning HQs in our codex is the weird boy with the Jump. The two with the most synergy is the warboss (which you have to work with the bikers) and the KFF mek to protect your backfield shooting. This list looks like something i would play, but i dont have great luck with my lists. I dont own any of the new buggies but the experienced ork players like them. I have been hesitant to invest in them. Perhaps if they see a buff with our upcoming codex, i'll consider them.
Best of luck.