So having a separate 'mirror view' to click into during flight is 'more real'?
How much more 'real' is it, as compared to, let's say, the AW-ish 'messy screen' cockpit with all the instruments laid out everywhere on the screen?
Or, will this 'mirror view' be present, let's say, on top of the screen during flight? If it be that case then it's basically the same thing as having a rear-view mirror modelled, and effects performance directly.
I for one, actually like the idea of rear-view mirrors.
But I don't want to see a separate supplementary screen implemented in the game - it hurts the 'everything in cockpit is worked in the cockpit' principle. Basically it's the same thing as F3 externals in principle.
The only way a rear-view mirror can work 'realistically' is by actually modelling them on the top canopy frame, which we will have to look up and see from the cockpit, without a separate view - and this, hurts performance.