well, i'm all in-line with the DIR-philosophy of minimalism and safety, but removing the boot, in my opinion, is overkill. A rubber boot works well as chock absorber, and there are more serious things than a slow leak, which could happen to your PG if it gets a mechanical chock. The needle could pop, or the spring. Also, gaps between the glass and the rim of the housing could result, not being detected until it's too late.
Why not start with removing the thing which makes the PG rotate (swivel in swedish, don't know the gizmo's name in english)? After all, that is the part which most ofently ****s up on the PG. The o-rings are often worn out... After all, it works just as well without swivel, you just set it in an angle which makes it possible to read, no matter your position (entanglement, etc) in the water. If someone else wants to read it, they will have to BEND the HP hose, which isn't very heavy work.
Personally I dive without the boot, since my PG came without one. If you think my arguments are weak / false, don't hesitate to post, I would really like to hear the arguments (except for the above) supporting the boot-less theory, maybe you can even convince me.
/Kristian