Starting size stack is all relative to the starting blinds/clock/levels. And number of BB"s on FT is really related to total time of tourney, especially in later stages.
Trend in some bigger tourneys recently has been to increase starting stacks, but also to start with blinds at 50/100 or 100/200 instead of 25/50. This does not cancel each other out though, as the tourney might start at the same number of BB"s, but later levels keep a deeper stack nature in the early levels at least.
There is also a general feeling that if you increase starting stack x5 ( say from 10k to 50k) that the tourney will take x5 longer. However dependent on the level structure the tourney will only take slightly longer, perhaps 4 or 5 levels more. So a 10 hour tourney might turn into a 12 hour tourney.
I agree with those who commented on a smoother structure. I would rather see the clock reduced slightly and have the extra levels in. With regard to APAT events ( and possible new season discusson) I would like to see the starting stack lifted to 15k, clock back to 40 minutes, 500/1000 & 1200/2400 (2500/5000?) levels introduced and an hour start earlier/hour finish later on day 1.