Hey, as I said, it's because it seems that we finally get 3d cockpits done. IF it works out it will look wierd having so much gauges floating in midair.
I'm thinkin more of the mods here like TBP or WCS. Imagine a Starfury cockpit with the gauges floating everywehre in the air.
Look at this(This is an old cockpit model from me which I'm now continuing to work on in anticipation of the implementation of 3d cockpits):
Now overlay the standard FS HUD over it...it'd look awful. While some stuff can be justified floating in the air like reticle, speed guges etc.(which could be explaind that it's being projected at the glass of the canopy like in modern fighter planes), other stuff would look wierd hovering unaligned around.
With HUD alterations(already possible) and the MFD switching thing you could overlay, for example own shield counter and comm menue on the left screen and the comm window and the enemy shield icon over the right screen, radar would be obviously in the middle. Even if we had a cockpit that'd move around a bit when you fly, it'd still look better if you wouldn't have twenty different gauges at various places. Understand?
Now if a different HUD layout for each ship would be possible it would be even better.
As for the kill counter I think it's useless, you can check your kills in the debriefing or pilot menue, it just takes away space, unless you have arcadish objectives like "kill 20 enemys to proceed to nxt mission" but if any mission would have a goal like that I wouldn't touch it anyway.