I use RED handle on the top mount and use the top rods to mount my RED Drive. So in my case I like the top mount.
I did find a solution last night for my problem. I mounted the ET mount on top of the the RED top mount instead of the front and moved the RED Handle to a universal mount just behind the top mount. Not ideal really, but it appears to be a good solution.
That said, I'm sure there's room for more alternatives in the EVF mount world. Certainly a different design could probably both accommodate the antenna and the RED top mount.
For anything but really stripped down mode I prefer to have the top handle extension rather than rely on just the top handle alone (too much leverage on that thin metal around the two bolts). This requires both top mounts, so removing the front top mount wouldn't be a good solution for me.