It's possible our trucks were designed and manufactured by the 'old GM' hence the weak interiors. The interiors on the new trucks are really nice, even on the '15 PPVs.
Thankfully these parts aren't terribly expensive to source so it's more of an annoyance at our ends.
The cracking dash is the only major interior expense I think. The dash alone costs more than $300. Add in the cost to replace all of the cheap trim pieces you break and you could spend $600 and tons of time just to fix a few cracks.