In doing my research there was a lot of back and forth I read on this topic. Many felt 24 mega-pixels is not a sufficient pixel-density (on a full-frame sensor) to make removing the OLPF worth while; that doing so would not improve sharpness. On cameras like the D800, with half-again as many pixels on the same surface area as the D750, it makes perfect sense to remove the OLPF and that's why we have the D800e, for example. To extend the logic, this is why some of the newer crop-sensor bodies (e.g. the D7200, D7100, D5300 and D3300) with the same number of MP do not have an OLPF either; the sensors overall pixel-density is increased with the same number of MP, obviously, because of its smaller physical dimensions. While that argument looked good on paper, it wasn't quite jiving in my mind.
The most logical conclusion for including the OLPF on the D750 I could come up with is two-fold and pieced together from other people's deeper insight. Primarily I'm convinced the D750 was meant to have as wide a market appeal as possible; and I mean *really* wide. If Master at None the D750 is a classic Jack-of-all-Trades in my estimation. In support of that idea I think Nikon wanted the D750 to be a camera worthy of serious consideration for those who shoot video as well as "still" photography. And when you consider how much bigger a concern moiré is for videographers it starts to make real sense (at least in my own mind). So, in short, that is the conclusion I came to from reading a lot of technical "back and forth" from several sources that, too be perfectly honest, I did not always fully understand.
In mulling over whether or not I wanted to have the OLPF pulled out of my camera I rationalized two possible outcomes: a significant improvement or very little improvement. So while it was a gamble of sorts, the risk seemed relatively low and the potential gain seemed relatively high. Had I over-thought things I probably would have paralyzed myself with indecision and done nothing.
As it turns out having OLPF removed has breathed new life into my camera; images are definitely cleaner and sharper by good margin and I'm very happy with my decision.
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