I've only used a sample of D151, about 8oz total, so take this FWIW:
I find it does flash pretty quick. But the nature of the product is for working faster than a dedicated polish. If you are doing slow passes (like 1" per second) then you will probably only get 2 passes in. I tend to work my sections faster when doing an AIO. Afterall, major correction is not the goal. Judging by your photo, you are getting pretty good correction, which tells me your section passes are slow.
So many variables to play with to fine tune this. If that level of correction from an AIO is your goal and you want to stick with D151, then consider a couple thing (some you may already be doing, but in wasn't clear in your posts or I just didn't read it well enough).
1.Work a smaller area than 2x2.
2.Use 6" pads instead of 5" or vice versa; in general, try a different pad size. Smaller will get slightly better correction when moving the polisher a little faster. Larger pad covers more area faster.
3.Bump up your pad aggressiveness 1 notch.
4.Prime your pad with pad conditioner (I think M34 is a popular option with megs polishes) or a little mineral oil (this can leave some streaking if too much is used and will affect durability). 5.Add a little extra product midway through your section passes (I think this is Tato's variation on the Smack Method using the 3401, so I shall coin it the Tato Method, Modified Tato Method or MTM)
6. Use a bit less pressure when working the product.
If you are willing to switch products, consider HD speed instead of D151.
