having and install this WARN 8274 for years..and no mount problem or anything you have wrote 
This may be one of those things that you have to experience personally to understand - your car is already so modified that you probably couldn't or wouldn't feel the difference, and since it appears to be a dedicated off road vehicle, it may also be a matter of you simply want/need the advantages of the high mount winch and are willing to accept the disadvantages that come with it.
You're adding 100+ pounds of winch & cable, along with another 75~150 of mount/bumper to the very front of the vehicle - in your case well out in front of the vehicle - this added weight affects the way the vehicle rides, the way it handles and the way it steers - you HAVE to compensate for it with either stiffer springs or coil spacers (both of which have their own impact on ride & handling), but they can only correct the loss of ride height, the effects of the additional weight on the vehicle's center of gravity and it's effect on the vehicle's handling will still remain, and will still be felt - the vehicle will be nose heavy and have a tendency to wallow.
Here are a couple of commercially available low mount designs - just so that you can get an idea of what can be done with a low mount winch - the first is by Taubenreuther of Germany, and the mount incudes a front skid plate that distributes the pulling forces between the front of the frame rails and the lower cross member - this actually pulls forward & up - it accommodates most of the Warn low mount winches, and the winch fits between & below the frame rails and behind the factory bumper box reinforcement.
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The impact on approach angle is minimal (as compared to a stock vehicle) and the added weight is kept low down and close in to the vehicle, thereby keeping the moment of inertia and it's effects on handling & steering as low as possible, the actual winch is out of sight reduces the possibility of theft & tampering.
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Here's another one, this is from AFN in Portugal, since it is a full plate bumper, it's obviously going to be heavier than the Taubenreuther, but the winch is again mounted in between the frame rails and behind where the box reinforcement would have been. This bumper also does not reduce the approach angle, the lowest part of it sits higher than that of the factory plastic bumper - the front tow loop, which passes through the factory bumper, passes below this one.
If I ever get around to completing my design it will probably be similar to the AFN in appearance, with the winch mounted in between the rails but "feet forward" as this allows thinner (and lighter) metal to be used whilst still maintaining adequate strength.