Update - I may actually have a FFA spawn problem on this map. I had played it that way a couple times before with no issues, but some friends and...
There should already be that sort of choke point going in and out of each base, as well as in different places on the bridges depending which way...
As far as I have ever been able to tell, framerate spikes with glass mostly occur when the engine has to render forge objects on the other side....